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>

Documentation/git-commit-tree.txt

@@ -40,7 +40,7 @@ OPTIONS
 
 -p <parent commit>::
 	Each '-p' indicates the id of a parent commit object.
-	
+
 
 Commit Information
 ------------------
@@ -107,4 +107,3 @@ Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel
 GIT
 ---
 Part of the gitlink:git[7] suite
-