hgwebdir: make collapsed folders easier to distinguish from repositories

Add a "/" character after the collapsed folder names, to make them easier to
distinguish from regular repository and subrepository entries.

mercurial/hgweb/hgwebdir_mod.py

@@ -293,9 +293,11 b' class hgwebdir(object):'
                     except OSError:
                         continue
 
+                    # add '/' to the name to make it obvious that
+                    # the entry is a directory, not a regular repository
                     row = dict(contact="",
                                contact_sort="",
-                               name=name,
+                               name=name + '/',
                                name_sort=name,
                                url=url,
                                description="",