Create backport branch for r1427278.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x-r1427278@1433724 13f79535-47bb-0310-9956-ffa450edef68
On the r1427278 backport branch, merge r1427278, resolving trivial conflict
on adding a comment (which had been edited a couple of times on trunk)
in diff_file.c.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x-r1427278@1433729 13f79535-47bb-0310-9956-ffa450edef68
Merge the 1.7.x-r1427278 branch back into 1.7.x.

 * r1427278
   Fix another issue in the diff-libraries whitespace normalization
   handling that might make diff show unexpected changes, and even trying
   to read beyond end of file.
   Justification:
     The diff library should behave properly when suppressing whitespace
     changes. See also http://svn.haxx.se/dev/archive-2012-12/0556.shtml
     for some examples of this bug.
   Notes:
     The branch is just needed for avoiding a conflict with adding a comment.
     Will probably conflict again if r1426752 and/or r1426762 are merged to
     1.7.x, because they all add a test to the testlist in diff-diff3-test.c.
   Branch:
     ^/subversion/branches/1.7.x-r1427278
   Votes:
     +1: jcorvel, rhuijben, stsp



git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1485340 13f79535-47bb-0310-9956-ffa450edef68