Add borders to images in issues, MRs, and Help.

CHANGELOG

@@ -18,6 +18,7 @@ v 8.9.0 (unreleased)
   - Redesign all Devise emails. !4297
   - Don't show 'Leave Project' to group members
   - Fix wiki page events' webhook to point to the wiki repository
+  - Add a border around images to differentiate them from the background.
   - Don't show tags for revert and cherry-pick operations
   - Fix issue todo not remove when leave project !4150 (Long Nguyen)
   - Allow customisable text on the 'nearly there' page after a user signs up

app/assets/stylesheets/pages/help.scss

@@ -57,4 +57,11 @@
 
 .documentation {
   padding: 7px;
+
+  // Border around images in the help pages.
+  img {
+    border: 1px solid $table-border-gray;
+    padding: 5px;
+    margin: 5px;
+  }
 }

app/assets/stylesheets/pages/issuable.scss

@@ -4,6 +4,13 @@
       margin-right: 1px;
     }
   }
+
+  // Border around images in issue and MR descriptions.
+  .description img {
+    border: 1px solid $table-border-gray;
+    padding: 5px;
+    margin: 5px;
+  }
 }
 
 .issuable-filter-count {

app/assets/stylesheets/pages/notes.scss

@@ -117,6 +117,13 @@ ul.notes {
         code {
           word-break: keep-all;
         }
+
+        // Border around images in issue and MR comments.
+        img {
+          border: 1px solid $table-border-gray;
+          padding: 5px;
+          margin: 5px 0;
+        }
       }
     }