Add error checking for command-line arguments to the Python regression tests.
Previously, a bad option would cause the test file to run in a default mode
as if no arguments were given, and any extra test numbers were ignored.
* subversion/tests/clients/cmdline/svntest/main.py
(run_tests): Allow errors in option and argument parsing to be reported.
Report an error if there are extra arguments.
git-svn-id: http://svn.apache.org/repos/asf/subversion/trunk/subversion/tests/clients/cmdline@857321 13f79535-47bb-0310-9956-ffa450edef68