[IMP] runbot: support github display for branch search

Supports the format (?owner)/repo#id in the `_search_dname` method.

runbot/models/branch.py

@@ -51,7 +51,7 @@ class Branch(models.Model):
     def _search_dname(self, operator, value):
         # Match format (owner?, repo, branch)
         owner = repo = branch = None
-        if (m := re.match(r'(?:([\w-]+)/)?([\w-]+):([\w\.-]+)', value)):
+        if (m := re.match(r'(?:([\w-]+)/)?([\w-]+)[:#]([\w\.-]+)', value)):
             owner, repo, branch = m.groups()
         # Match PR url format
         if (m := re.search(r'/([\w-]+)/([\w-]+)/pull/(\d+)', value)):

runbot/tests/test_branch.py

@@ -35,6 +35,10 @@ class TestBranch(RunbotCase):
             self.branch_server,
             self.Branch.search([('dname', '=', self.branch_server.dname)]),
         )
+        self.assertEqual(
+            self.branch_server,
+            self.Branch.search([('dname', '=', self.branch_server.dname.replace(':', '#'))]),
+        )
         # Basic pr
         self.assertEqual(
             self.dev_pr,