pull-requests: use proper validation of pull request title to prevent from bad errors.

rhodecode/apps/repository/views/repo_pull_requests.py

@@ -743,7 +743,7 b' class RepoPullRequestsView(RepoAppView, '
             if errors.error_dict.get('revisions'):
                 msg = 'Revisions: %s' % errors.error_dict['revisions']
             elif errors.error_dict.get('pullrequest_title'):
-                msg = _('Pull request requires a title with min. 3 chars')
+                msg = errors.error_dict.get('pullrequest_title')
             else:
                 msg = _('Error creating pull request: {}').format(errors)
             log.exception(msg)

rhodecode/model/forms.py

@@ -598,7 +598,7 b' def PullRequestForm(localizer, repo_id):'
         revisions = All(#v.NotReviewedRevisions(localizer, repo_id)(),
                         v.UniqueList(localizer)(not_empty=True))
         review_members = formencode.ForEach(ReviewerForm())
-        pullrequest_title = v.UnicodeString(strip=True, required=True)
+        pullrequest_title = v.UnicodeString(strip=True, required=True, min=3, max=255)
         pullrequest_desc = v.UnicodeString(strip=True, required=False)
 
     return _PullRequestForm