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
...
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Am0
adding a
$ echo b > b
$ hg ci -Am1
adding b
$ hg tag -r0 default
warning: tag default conflicts with existing branch name
$ hg log
changeset: 2:30a83d1e4a1e
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag default for changeset f7b1eb17ad24
changeset: 1:925d80f479bb
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 1
changeset: 0:f7b1eb17ad24
tag: default
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 0
$ hg update 'tag(default)'
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg parents
changeset: 0:f7b1eb17ad24
tag: default
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 0
$ hg update 'branch(default)'
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg parents
changeset: 2:30a83d1e4a1e
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Added tag default for changeset f7b1eb17ad24