Follow-up to r1899721, fix failing getopt_tests.py 2 and 4 on macOS.

* subversion/tests/cmdline/getopt_tests.py
  (del_lines_res): Replace "Mac OS X" with "macOS" in the pattern.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1915014 13f79535-47bb-0310-9956-ffa450edef68
1 file changed