* subversion/tests/libsvn_diff/diff-diff3-test.c
  (two_way_diff): Use a subpool to reduce the memory required to
   run diff-diff3-test 15.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1462129 13f79535-47bb-0310-9956-ffa450edef68