* subversion/tests/cmdline/svntest/verify.py
  (display_lines_diff): Handle a single string input properly. A follow-up to
    some recent change where I broke this case, I imagine.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1449178 13f79535-47bb-0310-9956-ffa450edef68