Fix comment.
Fix comment.

* subversion/tests/cmdline/copy_tests.py
  (allow_unversioned_parent_for_copy_src): Match comment with what's actually
   happening.

Suggested by: Daniel <danielsh@fastmail.fm>

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