Show more specific message when nonstandard brand has simply incomplete tags (close #6909)

data/core.yaml

@@ -1464,6 +1464,7 @@ en:
         reference: "Some features should have additional tags."
       noncanonical_brand:
         message: "{feature} looks like a brand with nonstandard tags"
+        message_incomplete: "{feature} looks like a brand with incomplete tags"
         reference: "All features of the same brand should be tagged the same way."
     point_as_vertex:
       message: '{feature} should be a standalone point based on its tags'

dist/locales/en.json

@@ -1813,6 +1813,7 @@
                 },
                 "noncanonical_brand": {
                     "message": "{feature} looks like a brand with nonstandard tags",
+                    "message_incomplete": "{feature} looks like a brand with incomplete tags",
                     "reference": "All features of the same brand should be tagged the same way."
                 }
             },

modules/validations/outdated_tags.js

@@ -173,7 +173,15 @@ export function validationOutdatedTags(context) {
             var currEntity = context.hasEntity(entity.id);
             if (!currEntity) return '';
 
-            return t('issues.outdated_tags.' + prefix + 'message',
+            var messageID = 'issues.outdated_tags.' + prefix + 'message';
+
+            if (subtype === 'noncanonical_brand' && tagDiff.every(function(d) {
+                return d.type === '+';
+            })) {
+                messageID += '_incomplete';
+            }
+
+            return t(messageID,
                 { feature: utilDisplayLabel(currEntity, context) }
             );
         }