Create backport branch for r1426752

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x-r1426752@1426753 13f79535-47bb-0310-9956-ffa450edef68
Merge the 1.7.x-r1426752 branch back into 1.7.x.

 * r1426752
   Fix Issue #4133, an issue in the diff-libraries whitespace normalization
   handling that might make diff use the wrong tokens, showing up as
   unexpected changes.
   Justification:
     The diff library should behave properly when suppressing whitespace
     changes.
   Notes:
     The branch is just needed for avoiding a conflict with the testcase.
     Will probably conflict again if r1426762 and/or r1427278 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-r1426752
   Votes:
     +1: rhuijben, jcorvel, stsp


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1485337 13f79535-47bb-0310-9956-ffa450edef68