run-tests: replace '#' with '-' in temp path of repos created for tests

If we have multiple cases in a test, that leads us to a temp path of
format "<temp-path>-<case1>#<case2>".
This leads to  hg.parseurl() parsing the path and take part
after `#` as a branch name.

I encountered this bug while adding support for share-safe case in next patch.

Differential Revision: https://phab.mercurial-scm.org/D8647

tests/run-tests.py

@@ -1595,7 +1595,7 b' class TTest(Test):'
             casepath = b'#'.join(case)
             self.name = '%s#%s' % (self.name, _bytes2sys(casepath))
             self.errpath = b'%s#%s.err' % (self.errpath[:-4], casepath)
-            self._tmpname += b'-%s' % casepath
+            self._tmpname += b'-%s' % casepath.replace(b'#', b'-')
         self._have = {}
 
     @property