Emoji shouldn't have borders. #EmojiWithoutBorders

app/assets/stylesheets/pages/help.scss

@@ -59,7 +59,7 @@
   padding: 7px;
 
   // Border around images in the help pages.
-  img {
+  img:not(.emoji) {
     border: 1px solid $table-border-gray;
     padding: 5px;
     margin: 5px;

app/assets/stylesheets/pages/issuable.scss

@@ -6,7 +6,7 @@
   }
 
   // Border around images in issue and MR descriptions.
-  .description img {
+  .description img:not(.emoji) {
     border: 1px solid $table-border-gray;
     padding: 5px;
     margin: 5px;

app/assets/stylesheets/pages/notes.scss

@@ -119,7 +119,7 @@ ul.notes {
         }
 
         // Border around images in issue and MR comments.
-        img {
+        img:not(.emoji) {
           border: 1px solid $table-border-gray;
           padding: 5px;
           margin: 5px 0;