emacs: fix copy event handler

lib/ace/keyboard/emacs.js

@@ -516,12 +516,12 @@ exports.handler.addCommands({
     killRingSave: {
         exec: function(editor) {
             exports.killRing.add(editor.getCopyText());
-            (function() {
+            set(function() {
                 var sel = editor.selection,
                     range = sel.getRange();
                 editor.pushEmacsMark(sel.isBackwards() ? range.end : range.start);
                 sel.clearSelection();
-            }).delay(0);
+            }, 0);
         },
         readonly: true
     },