Remove a few more flush() invocations.
Remove a few more flush() invocations.

* subversion/tests/cmdline/svntest/main.py:
  (copy_repos): print the error rather than writing/flushing to stdout
  (TestRunner.run): don't worry about flushing the output.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion