War on whitespace

This uses "git-apply --whitespace=strip" to fix whitespace errors that have
crept in to our source files over time.  There are a few files that need
to have trailing whitespaces (most notably, test vectors).  The results
still passes the test, and build result in Documentation/ area is unchanged.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-merge-index.txt b/Documentation/git-merge-index.txt
index b8ee1ff..17e9f10 100644
--- a/Documentation/git-merge-index.txt
+++ b/Documentation/git-merge-index.txt
@@ -59,7 +59,7 @@
   This is modified MM in the branch B.			# merge2
   This is modified MM in the branch B.			# current contents
 
-or 
+or
 
   torvalds@ppc970:~/merge-test> git-merge-index cat AA MM
   cat: : No such file or directory
@@ -85,4 +85,3 @@
 GIT
 ---
 Part of the gitlink:git[7] suite
-