helpers: more helpful error messages for changeset not found

kallithea/lib/base.py

@@ -513,7 +513,8 b' class BaseRepoController(BaseController)'
                     category='error')
             raise webob.exc.HTTPNotFound()
         except ChangesetDoesNotExistError as e:
-            h.flash(h.literal(_('Changeset not found')),
+            h.flash(h.literal(_('Changeset for %s %s not found in %s') %
+                              (ref_type, ref_name, repo.repo_name)),
                     category='error')
             raise webob.exc.HTTPNotFound()
         except RepositoryError as e:

kallithea/lib/helpers.py

@@ -620,7 +620,7 b' def action_parser(user_log, feed=False, '
             else:
                 # changeset cannot be found - it might have been stripped or removed
                 lbl = rev[:12]
-                title_ = _('Changeset not found')
+                title_ = _('Changeset %s not found') % lbl
             if parse_cs:
                 return link_to(lbl, url_, title=title_, class_='tooltip')
             return link_to(lbl, url_, raw_id=rev.raw_id, repo_name=repo_name,