Merge branch 'nd/rebase-show-current-patch'

The new "--show-current-patch" option gives an end-user facing way
to get the diff being applied when "git rebase" (and "git am")
stops with a conflict.

* nd/rebase-show-current-patch:
  rebase: introduce and use pseudo-ref REBASE_HEAD
  rebase: add --show-current-patch
  am: add --show-current-patch
diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 460662e..6f6c34b 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -16,7 +16,7 @@
 	 [--exclude=<path>] [--include=<path>] [--reject] [-q | --quiet]
 	 [--[no-]scissors] [-S[<keyid>]] [--patch-format=<format>]
 	 [(<mbox> | <Maildir>)...]
-'git am' (--continue | --skip | --abort | --quit)
+'git am' (--continue | --skip | --abort | --quit | --show-current-patch)
 
 DESCRIPTION
 -----------
@@ -171,6 +171,10 @@
 	Abort the patching operation but keep HEAD and the index
 	untouched.
 
+--show-current-patch::
+	Show the patch being applied when "git am" is stopped because
+	of conflicts.
+
 DISCUSSION
 ----------