Merged in [17227] from rjsparks@nostrum.com:

    Allow document Additional URLs to become empty. Fixes ietf-tools#2864.
 - Legacy-Id: 17229
Note: SVN reference [17227] has been migrated to Git commit 0c0cc5d

Author: levkowetz

ietf/doc/views_draft.py

@@ -1,4 +1,4 @@
-# Copyright The IETF Trust 2010-2019, All Rights Reserved
+# Copyright The IETF Trust 2010-2020, All Rights Reserved
 # -*- coding: utf-8 -*-
 
 
@@ -1188,8 +1188,8 @@ class DocumentUrlForm(forms.Form):
         def clean_urls(self):
             lines = [x.strip() for x in self.cleaned_data["urls"].splitlines() if x.strip()]
             url_validator = URLValidator()
+            errors = []
             for l in lines:
-                errors = []
                 parts = l.split()
                 if len(parts) == 1:
                     errors.append("Too few fields: Expected at least url and tag: '%s'" % l)