Add a closeOnTokenChange option to simpleHint.

lib/util/simple-hint.js

@@ -12,6 +12,12 @@
 
       var tempToken = editor.getTokenAt(editor.getCursor());
 
+      // Don't show completions if token has changed and the option is set.
+      if (options.closeOnTokenChange && previousToken != null &&
+          (tempToken.start != previousToken.start || tempToken.className != previousToken.className)) {
+        return;
+      }
+
       var result = getHints(editor);
       if (!result || !result.list.length) return;
       var completions = result.list;
@@ -85,6 +91,7 @@
     return collectHints();
   };
   CodeMirror.simpleHint.defaults = {
-    closeOnBackspace: true
+    closeOnBackspace: true,
+    closeOnTokenChange: false
   };
 })();