Improve a regression test.
Improve a regression test.

* subversion/tests/libsvn_fs/fs-test.c
  (svn_hash.h): Include.
  (filename_trailing_newline): Switch from a blacklist approach to
    to a whitelist approach, for defining backends that don't implement
    the API correctly.  Also extend the test to actually commit the files and
    dirs, and verify the commit.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1498484 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion