Use correct grammar in diffstat summary line

"git diff --stat" and "git apply --stat" now learn to print the line
"%d files changed, %d insertions(+), %d deletions(-)" in singular form
whenever applicable. "0 insertions" and "0 deletions" are also omitted
unless they are both zero.

This matches how versions of "diffstat" that are not prehistoric produced
their output, and also makes this line translatable.

[jc: with help from Thomas Dickey in archaeology of "diffstat"]
[jc: squashed Jonathan's updates to illustrations in tutorials and a test]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_master b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_master
index 3a9f78a..2f8560c 100644
--- a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_master
@@ -2,7 +2,7 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --cc dir/sub
 index cead32e,7289e35..992913c
diff --git a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_side b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_side
index a61ad8c..72e03c1 100644
--- a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_side
+++ b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_--summary_side
@@ -3,7 +3,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_master b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_master
index 49f23b9..8b357d9 100644
--- a/t/t4013/diff.diff-tree_--cc_--patch-with-stat_master
+++ b/t/t4013/diff.diff-tree_--cc_--patch-with-stat_master
@@ -2,7 +2,7 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --cc dir/sub
 index cead32e,7289e35..992913c
diff --git a/t/t4013/diff.diff-tree_--cc_--stat_--summary_master b/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
index cc6eb3b..e0568d6 100644
--- a/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
+++ b/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
@@ -2,5 +2,5 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 $
diff --git a/t/t4013/diff.diff-tree_--cc_--stat_--summary_side b/t/t4013/diff.diff-tree_--cc_--stat_--summary_side
index 50362be..5afc823 100644
--- a/t/t4013/diff.diff-tree_--cc_--stat_--summary_side
+++ b/t/t4013/diff.diff-tree_--cc_--stat_--summary_side
@@ -3,6 +3,6 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 $
diff --git a/t/t4013/diff.diff-tree_--cc_--stat_master b/t/t4013/diff.diff-tree_--cc_--stat_master
index fae7f33..f48367a 100644
--- a/t/t4013/diff.diff-tree_--cc_--stat_master
+++ b/t/t4013/diff.diff-tree_--cc_--stat_master
@@ -2,5 +2,5 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 $
diff --git a/t/t4013/diff.diff-tree_--pretty=oneline_--root_--patch-with-stat_initial b/t/t4013/diff.diff-tree_--pretty=oneline_--root_--patch-with-stat_initial
index d5c333a..590864c 100644
--- a/t/t4013/diff.diff-tree_--pretty=oneline_--root_--patch-with-stat_initial
+++ b/t/t4013/diff.diff-tree_--pretty=oneline_--root_--patch-with-stat_initial
@@ -3,7 +3,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 new file mode 100644
diff --git a/t/t4013/diff.diff-tree_--pretty_--patch-with-stat_side b/t/t4013/diff.diff-tree_--pretty_--patch-with-stat_side
index 4d30e7e..e05e778 100644
--- a/t/t4013/diff.diff-tree_--pretty_--patch-with-stat_side
+++ b/t/t4013/diff.diff-tree_--pretty_--patch-with-stat_side
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
diff --git a/t/t4013/diff.diff-tree_--pretty_--root_--patch-with-stat_initial b/t/t4013/diff.diff-tree_--pretty_--root_--patch-with-stat_initial
index 7dfa6af..0e2c956 100644
--- a/t/t4013/diff.diff-tree_--pretty_--root_--patch-with-stat_initial
+++ b/t/t4013/diff.diff-tree_--pretty_--root_--patch-with-stat_initial
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 new file mode 100644
diff --git a/t/t4013/diff.diff-tree_--pretty_--root_--stat_--summary_initial b/t/t4013/diff.diff-tree_--pretty_--root_--stat_--summary_initial
index 43bfce2..384fa44 100644
--- a/t/t4013/diff.diff-tree_--pretty_--root_--stat_--summary_initial
+++ b/t/t4013/diff.diff-tree_--pretty_--root_--stat_--summary_initial
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.diff-tree_--pretty_--root_--stat_initial b/t/t4013/diff.diff-tree_--pretty_--root_--stat_initial
index 9154aa4..10384a8 100644
--- a/t/t4013/diff.diff-tree_--pretty_--root_--stat_initial
+++ b/t/t4013/diff.diff-tree_--pretty_--root_--stat_initial
@@ -8,5 +8,5 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 $
diff --git a/t/t4013/diff.diff-tree_--root_--patch-with-stat_initial b/t/t4013/diff.diff-tree_--root_--patch-with-stat_initial
index 1562b62..f57062e 100644
--- a/t/t4013/diff.diff-tree_--root_--patch-with-stat_initial
+++ b/t/t4013/diff.diff-tree_--root_--patch-with-stat_initial
@@ -3,7 +3,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 new file mode 100644
diff --git a/t/t4013/diff.diff-tree_-c_--stat_--summary_master b/t/t4013/diff.diff-tree_-c_--stat_--summary_master
index ac9f641..7088683 100644
--- a/t/t4013/diff.diff-tree_-c_--stat_--summary_master
+++ b/t/t4013/diff.diff-tree_-c_--stat_--summary_master
@@ -2,5 +2,5 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 $
diff --git a/t/t4013/diff.diff-tree_-c_--stat_--summary_side b/t/t4013/diff.diff-tree_-c_--stat_--summary_side
index 2afcca1..ef216ab 100644
--- a/t/t4013/diff.diff-tree_-c_--stat_--summary_side
+++ b/t/t4013/diff.diff-tree_-c_--stat_--summary_side
@@ -3,6 +3,6 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 $
diff --git a/t/t4013/diff.diff-tree_-c_--stat_master b/t/t4013/diff.diff-tree_-c_--stat_master
index c2fe6a9..ad19f10 100644
--- a/t/t4013/diff.diff-tree_-c_--stat_master
+++ b/t/t4013/diff.diff-tree_-c_--stat_master
@@ -2,5 +2,5 @@
 59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 $
diff --git a/t/t4013/diff.diff_--patch-with-stat_-r_initial..side b/t/t4013/diff.diff_--patch-with-stat_-r_initial..side
index 9ed317a..ddad917 100644
--- a/t/t4013/diff.diff_--patch-with-stat_-r_initial..side
+++ b/t/t4013/diff.diff_--patch-with-stat_-r_initial..side
@@ -2,7 +2,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
diff --git a/t/t4013/diff.diff_--patch-with-stat_initial..side b/t/t4013/diff.diff_--patch-with-stat_initial..side
index 8b50629..bdbd114 100644
--- a/t/t4013/diff.diff_--patch-with-stat_initial..side
+++ b/t/t4013/diff.diff_--patch-with-stat_initial..side
@@ -2,7 +2,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
diff --git a/t/t4013/diff.diff_--stat_initial..side b/t/t4013/diff.diff_--stat_initial..side
index 0517b5d..6d08f3d 100644
--- a/t/t4013/diff.diff_--stat_initial..side
+++ b/t/t4013/diff.diff_--stat_initial..side
@@ -2,5 +2,5 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 $
diff --git a/t/t4013/diff.diff_-r_--stat_initial..side b/t/t4013/diff.diff_-r_--stat_initial..side
index 245220d..2ddb254 100644
--- a/t/t4013/diff.diff_-r_--stat_initial..side
+++ b/t/t4013/diff.diff_-r_--stat_initial..side
@@ -2,5 +2,5 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 $
diff --git a/t/t4013/diff.format-patch_--attach_--stdout_--suffix=.diff_initial..side b/t/t4013/diff.format-patch_--attach_--stdout_--suffix=.diff_initial..side
index 52116d3..3cab049 100644
--- a/t/t4013/diff.format-patch_--attach_--stdout_--suffix=.diff_initial..side
+++ b/t/t4013/diff.format-patch_--attach_--stdout_--suffix=.diff_initial..side
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--attach_--stdout_initial..master b/t/t4013/diff.format-patch_--attach_--stdout_initial..master
index ce49bd6..564a4d3 100644
--- a/t/t4013/diff.format-patch_--attach_--stdout_initial..master
+++ b/t/t4013/diff.format-patch_--attach_--stdout_initial..master
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
@@ -124,7 +124,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--attach_--stdout_initial..master^ b/t/t4013/diff.format-patch_--attach_--stdout_initial..master^
index 5f1b238..4f28460 100644
--- a/t/t4013/diff.format-patch_--attach_--stdout_initial..master^
+++ b/t/t4013/diff.format-patch_--attach_--stdout_initial..master^
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
diff --git a/t/t4013/diff.format-patch_--attach_--stdout_initial..side b/t/t4013/diff.format-patch_--attach_--stdout_initial..side
index 4a2364a..b10cc2e 100644
--- a/t/t4013/diff.format-patch_--attach_--stdout_initial..side
+++ b/t/t4013/diff.format-patch_--attach_--stdout_initial..side
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--inline_--stdout_--numbered-files_initial..master b/t/t4013/diff.format-patch_--inline_--stdout_--numbered-files_initial..master
index 43b81eb..a976a8a 100644
--- a/t/t4013/diff.format-patch_--inline_--stdout_--numbered-files_initial..master
+++ b/t/t4013/diff.format-patch_--inline_--stdout_--numbered-files_initial..master
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
@@ -124,7 +124,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--inline_--stdout_--subject-prefix=TESTCASE_initial..master b/t/t4013/diff.format-patch_--inline_--stdout_--subject-prefix=TESTCASE_initial..master
index ca3f60b..b4fd664 100644
--- a/t/t4013/diff.format-patch_--inline_--stdout_--subject-prefix=TESTCASE_initial..master
+++ b/t/t4013/diff.format-patch_--inline_--stdout_--subject-prefix=TESTCASE_initial..master
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
@@ -124,7 +124,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--inline_--stdout_initial..master b/t/t4013/diff.format-patch_--inline_--stdout_initial..master
index 08f2301..0d31036 100644
--- a/t/t4013/diff.format-patch_--inline_--stdout_initial..master
+++ b/t/t4013/diff.format-patch_--inline_--stdout_initial..master
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
@@ -124,7 +124,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--inline_--stdout_initial..master^ b/t/t4013/diff.format-patch_--inline_--stdout_initial..master^
index 07f1230..18d4714 100644
--- a/t/t4013/diff.format-patch_--inline_--stdout_initial..master^
+++ b/t/t4013/diff.format-patch_--inline_--stdout_initial..master^
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 
diff --git a/t/t4013/diff.format-patch_--inline_--stdout_initial..side b/t/t4013/diff.format-patch_--inline_--stdout_initial..side
index 67633d4..3572f20 100644
--- a/t/t4013/diff.format-patch_--inline_--stdout_initial..side
+++ b/t/t4013/diff.format-patch_--inline_--stdout_initial..side
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 
diff --git a/t/t4013/diff.format-patch_--stdout_--cover-letter_-n_initial..master^ b/t/t4013/diff.format-patch_--stdout_--cover-letter_-n_initial..master^
index 3b4e113..54cdcda 100644
--- a/t/t4013/diff.format-patch_--stdout_--cover-letter_-n_initial..master^
+++ b/t/t4013/diff.format-patch_--stdout_--cover-letter_-n_initial..master^
@@ -75,7 +75,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.format-patch_--stdout_--no-numbered_initial..master b/t/t4013/diff.format-patch_--stdout_--no-numbered_initial..master
index f7752eb..23194eb 100644
--- a/t/t4013/diff.format-patch_--stdout_--no-numbered_initial..master
+++ b/t/t4013/diff.format-patch_--stdout_--no-numbered_initial..master
@@ -53,7 +53,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -88,7 +88,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.format-patch_--stdout_--numbered_initial..master b/t/t4013/diff.format-patch_--stdout_--numbered_initial..master
index 8e67dbf..78f1a80 100644
--- a/t/t4013/diff.format-patch_--stdout_--numbered_initial..master
+++ b/t/t4013/diff.format-patch_--stdout_--numbered_initial..master
@@ -53,7 +53,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -88,7 +88,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.format-patch_--stdout_initial..master b/t/t4013/diff.format-patch_--stdout_initial..master
index 7b89978..a3dab7f 100644
--- a/t/t4013/diff.format-patch_--stdout_initial..master
+++ b/t/t4013/diff.format-patch_--stdout_initial..master
@@ -53,7 +53,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -88,7 +88,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.format-patch_--stdout_initial..master^ b/t/t4013/diff.format-patch_--stdout_initial..master^
index b7f9725..39f4a3f 100644
--- a/t/t4013/diff.format-patch_--stdout_initial..master^
+++ b/t/t4013/diff.format-patch_--stdout_initial..master^
@@ -53,7 +53,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.format-patch_--stdout_initial..side b/t/t4013/diff.format-patch_--stdout_initial..side
index e765088..8810920 100644
--- a/t/t4013/diff.format-patch_--stdout_initial..side
+++ b/t/t4013/diff.format-patch_--stdout_initial..side
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.log_--patch-with-stat_--summary_master_--_dir_ b/t/t4013/diff.log_--patch-with-stat_--summary_master_--_dir_
index bd7f5c0..4085bbd 100644
--- a/t/t4013/diff.log_--patch-with-stat_--summary_master_--_dir_
+++ b/t/t4013/diff.log_--patch-with-stat_--summary_master_--_dir_
@@ -13,7 +13,7 @@
     Side
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -32,7 +32,7 @@
     Third
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -54,7 +54,7 @@
     This is the second commit.
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..8422d40 100644
diff --git a/t/t4013/diff.log_--patch-with-stat_master b/t/t4013/diff.log_--patch-with-stat_master
index 14595a6..4586279 100644
--- a/t/t4013/diff.log_--patch-with-stat_master
+++ b/t/t4013/diff.log_--patch-with-stat_master
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -56,7 +56,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
diff --git a/t/t4013/diff.log_--patch-with-stat_master_--_dir_ b/t/t4013/diff.log_--patch-with-stat_master_--_dir_
index 5a4e727..6e172cf 100644
--- a/t/t4013/diff.log_--patch-with-stat_master_--_dir_
+++ b/t/t4013/diff.log_--patch-with-stat_master_--_dir_
@@ -13,7 +13,7 @@
     Side
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -32,7 +32,7 @@
     Third
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -54,7 +54,7 @@
     This is the second commit.
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..8422d40 100644
diff --git a/t/t4013/diff.log_--root_--cc_--patch-with-stat_--summary_master b/t/t4013/diff.log_--root_--cc_--patch-with-stat_--summary_master
index df0aaa9..48b0d4b 100644
--- a/t/t4013/diff.log_--root_--cc_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.log_--root_--cc_--patch-with-stat_--summary_master
@@ -8,7 +8,7 @@
 
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --cc dir/sub
 index cead32e,7289e35..992913c
@@ -47,7 +47,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -89,7 +89,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -165,7 +165,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.log_--root_--patch-with-stat_--summary_master b/t/t4013/diff.log_--root_--patch-with-stat_--summary_master
index c11b5f2c..f9dc512 100644
--- a/t/t4013/diff.log_--root_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.log_--root_--patch-with-stat_--summary_master
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -57,7 +57,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -133,7 +133,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.log_--root_--patch-with-stat_master b/t/t4013/diff.log_--root_--patch-with-stat_master
index 5f0c98f..0807ece 100644
--- a/t/t4013/diff.log_--root_--patch-with-stat_master
+++ b/t/t4013/diff.log_--root_--patch-with-stat_master
@@ -15,7 +15,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -56,7 +56,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -130,7 +130,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 new file mode 100644
diff --git a/t/t4013/diff.log_--root_-c_--patch-with-stat_--summary_master b/t/t4013/diff.log_--root_-c_--patch-with-stat_--summary_master
index e62c368..84f5ef6 100644
--- a/t/t4013/diff.log_--root_-c_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.log_--root_-c_--patch-with-stat_--summary_master
@@ -8,7 +8,7 @@
 
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --combined dir/sub
 index cead32e,7289e35..992913c
@@ -47,7 +47,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -89,7 +89,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -165,7 +165,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.show_--patch-with-stat_--summary_side b/t/t4013/diff.show_--patch-with-stat_--summary_side
index 377f2b7..e60384d 100644
--- a/t/t4013/diff.show_--patch-with-stat_--summary_side
+++ b/t/t4013/diff.show_--patch-with-stat_--summary_side
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
diff --git a/t/t4013/diff.show_--patch-with-stat_side b/t/t4013/diff.show_--patch-with-stat_side
index fb14c53..a3a3255 100644
--- a/t/t4013/diff.show_--patch-with-stat_side
+++ b/t/t4013/diff.show_--patch-with-stat_side
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
diff --git a/t/t4013/diff.show_--stat_--summary_side b/t/t4013/diff.show_--stat_--summary_side
index 5bd5977..d16f464 100644
--- a/t/t4013/diff.show_--stat_--summary_side
+++ b/t/t4013/diff.show_--stat_--summary_side
@@ -8,6 +8,6 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 $
diff --git a/t/t4013/diff.show_--stat_side b/t/t4013/diff.show_--stat_side
index 3b22327..6300c05 100644
--- a/t/t4013/diff.show_--stat_side
+++ b/t/t4013/diff.show_--stat_side
@@ -8,5 +8,5 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 $
diff --git a/t/t4013/diff.whatchanged_--patch-with-stat_--summary_master_--_dir_ b/t/t4013/diff.whatchanged_--patch-with-stat_--summary_master_--_dir_
index 6a467cc..16ae543 100644
--- a/t/t4013/diff.whatchanged_--patch-with-stat_--summary_master_--_dir_
+++ b/t/t4013/diff.whatchanged_--patch-with-stat_--summary_master_--_dir_
@@ -6,7 +6,7 @@
     Side
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -25,7 +25,7 @@
     Third
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -47,7 +47,7 @@
     This is the second commit.
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..8422d40 100644
diff --git a/t/t4013/diff.whatchanged_--patch-with-stat_master b/t/t4013/diff.whatchanged_--patch-with-stat_master
index 1e1bbe1..f3e45ec 100644
--- a/t/t4013/diff.whatchanged_--patch-with-stat_master
+++ b/t/t4013/diff.whatchanged_--patch-with-stat_master
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -49,7 +49,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
diff --git a/t/t4013/diff.whatchanged_--patch-with-stat_master_--_dir_ b/t/t4013/diff.whatchanged_--patch-with-stat_master_--_dir_
index 13789f1..c77f0bc 100644
--- a/t/t4013/diff.whatchanged_--patch-with-stat_master_--_dir_
+++ b/t/t4013/diff.whatchanged_--patch-with-stat_master_--_dir_
@@ -6,7 +6,7 @@
     Side
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -25,7 +25,7 @@
     Third
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -47,7 +47,7 @@
     This is the second commit.
 ---
  dir/sub |    2 ++
- 1 files changed, 2 insertions(+), 0 deletions(-)
+ 1 file changed, 2 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..8422d40 100644
diff --git a/t/t4013/diff.whatchanged_--root_--cc_--patch-with-stat_--summary_master b/t/t4013/diff.whatchanged_--root_--cc_--patch-with-stat_--summary_master
index e96ff1f..8d03efe 100644
--- a/t/t4013/diff.whatchanged_--root_--cc_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.whatchanged_--root_--cc_--patch-with-stat_--summary_master
@@ -8,7 +8,7 @@
 
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --cc dir/sub
 index cead32e,7289e35..992913c
@@ -47,7 +47,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -89,7 +89,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -165,7 +165,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.whatchanged_--root_--patch-with-stat_--summary_master b/t/t4013/diff.whatchanged_--root_--patch-with-stat_--summary_master
index 0291153..1874d06 100644
--- a/t/t4013/diff.whatchanged_--root_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.whatchanged_--root_--patch-with-stat_--summary_master
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -50,7 +50,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -126,7 +126,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2
diff --git a/t/t4013/diff.whatchanged_--root_--patch-with-stat_master b/t/t4013/diff.whatchanged_--root_--patch-with-stat_master
index 9b0349c..5211ff2 100644
--- a/t/t4013/diff.whatchanged_--root_--patch-with-stat_master
+++ b/t/t4013/diff.whatchanged_--root_--patch-with-stat_master
@@ -8,7 +8,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 35d242b..7289e35 100644
@@ -49,7 +49,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 index 8422d40..cead32e 100644
@@ -123,7 +123,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
 
 diff --git a/dir/sub b/dir/sub
 new file mode 100644
diff --git a/t/t4013/diff.whatchanged_--root_-c_--patch-with-stat_--summary_master b/t/t4013/diff.whatchanged_--root_-c_--patch-with-stat_--summary_master
index c0aff68..ad30245 100644
--- a/t/t4013/diff.whatchanged_--root_-c_--patch-with-stat_--summary_master
+++ b/t/t4013/diff.whatchanged_--root_-c_--patch-with-stat_--summary_master
@@ -8,7 +8,7 @@
 
  dir/sub |    2 ++
  file0   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
 
 diff --combined dir/sub
 index cead32e,7289e35..992913c
@@ -47,7 +47,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file3   |    4 ++++
- 3 files changed, 9 insertions(+), 0 deletions(-)
+ 3 files changed, 9 insertions(+)
  create mode 100644 file3
 
 diff --git a/dir/sub b/dir/sub
@@ -89,7 +89,7 @@
 ---
  dir/sub |    2 ++
  file1   |    3 +++
- 2 files changed, 5 insertions(+), 0 deletions(-)
+ 2 files changed, 5 insertions(+)
  create mode 100644 file1
 
 diff --git a/dir/sub b/dir/sub
@@ -165,7 +165,7 @@
  dir/sub |    2 ++
  file0   |    3 +++
  file2   |    3 +++
- 3 files changed, 8 insertions(+), 0 deletions(-)
+ 3 files changed, 8 insertions(+)
  create mode 100644 dir/sub
  create mode 100644 file0
  create mode 100644 file2