run-tests: use regex when searching for $HGPORT in test output This prevents spurious errors when a changeset hash happens to match the port number. Before, this invocation gave a test failure: $ ./run-tests.py test-log.t --port 24427 ERROR: /home/mg/src/mercurial-crew/tests/test-log.t output changed --- /home/mg/src/mercurial-crew/tests/test-log.t +++ /home/mg/src/mercurial-crew/tests/test-log.t.err @@ -626,12 +626,12 @@ $ hg log -b default changeset: 2:c3a4f03cc9a7 - parent: 0:24427303d56f + parent: 0:$HGPORT303d56f user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: commit on default ... [ original upstream message ]