Remove leading comma when user is the only one to award that emoji

Fixes #9073

CHANGELOG

@@ -58,6 +58,7 @@ v 8.4.0 (unreleased)
   - Import GitHub wiki into GitLab
   - Add reporters ability to download and browse build artifacts (Andrew Johnson)
   - Autofill referring url in message box when reporting user abuse. (Josh Frye)
+  - Remove leading comma on award emoji when the user is the first to award the emoji (Zeger-Jan van de Weg)
 
 v 8.3.4
   - Use gitlab-workhorse 0.5.4 (fixes API routing bug)

app/assets/javascripts/awards_handler.coffee

@@ -19,7 +19,7 @@ class @AwardsHandler
       @addAwardToEmojiBar(emoji)
 
     $(".emoji-menu").hide()
-    
+
   addAwardToEmojiBar: (emoji) ->
     @addEmojiToFrequentlyUsedList(emoji)
 
@@ -66,9 +66,14 @@ class @AwardsHandler
 
   addMeToAuthorList: (emoji) ->
     award_block = @findEmojiIcon(emoji).parent()
-    authors = award_block.attr("data-original-title").split(", ")
+    authors = _.compact(award_block.attr("data-original-title").split(", "))
     authors.push("me")
-    award_block.attr("title", authors.join(", "))
+
+    if authors.length == 1
+      award_block.attr("title", "me")
+    else
+      award_block.attr("title", authors.join(", "))
+
     @resetTooltip(award_block)
 
   resetTooltip: (award) ->
@@ -78,7 +83,7 @@ class @AwardsHandler
     setTimeout (->
       award.tooltip()
     ), 200
-    
+
 
   createEmoji: (emoji) ->
     emojiCssClass = @resolveNameToCssClass(emoji)