Merge branch 'coffeescript_syntax_error' into 'master'

Fix syntax error in autosave coffeescript.

According to http://coffeescript.org/#try , `catch` needs to have an argument.

Otherwise, `Error: Parse error on line 19: Unexpected 'INDENT'` error is raised when converting to JS by coffee-script.

Fixes gitlab-org/gitlab-ce#3302


See merge request !2985

app/assets/javascripts/autosave.js.coffee

@@ -16,7 +16,7 @@ class @Autosave
 
     try
       text = window.localStorage.getItem @key
-    catch
+    catch e
       return
 
     @field.val text if text?.length > 0