shadow: Simplyfy the regular expression for detecting shadow repository URLs

rhodecode/lib/middleware/simplevcs.py

@@ -94,7 +94,7 b' class SimpleVCS(object):'
     # we use this regex which will match only on URLs pointing to shadow
     # repositories.
     shadow_repo_re = re.compile(
-        '(?P<groups>(?:{slug_pat})(?:/{slug_pat})*/)?'  # repo groups
+        '(?P<groups>(?:{slug_pat}/)*)'  # repo groups
         '(?P<target>{slug_pat})/'                       # target repo
         'pull-request/(?P<pr_id>\d+)/'                  # pull request
         'repository$'                                   # shadow repo