diff --git a/ace.d.ts b/ace.d.ts
index 186c3af4731..4509ca29e2f 100644
--- a/ace.d.ts
+++ b/ace.d.ts
@@ -397,6 +397,10 @@ export namespace Ace {
     canRedo(): boolean;
     bookmark(rev?: number): void;
     isAtBookmark(): boolean;
+    hasUndo(): boolean;
+    hasRedo(): boolean;
+    isClean(): boolean;
+    markClean(rev?: number): void;
   }
 
   export interface Position {
@@ -459,7 +463,7 @@ export namespace Ace {
       inFront?: boolean): number;
     addDynamicMarker(marker: MarkerLike, inFront: boolean): MarkerLike;
     removeMarker(markerId: number): void;
-    getMarkers(inFront?: boolean): MarkerLike[];
+    getMarkers(inFront?: boolean): {[id: number]: MarkerLike};
     highlight(re: RegExp): void;
     highlightLines(startRow: number,
       endRow: number,
diff --git a/src/ext/language_tools.js b/src/ext/language_tools.js
index 2cfa7bb831c..943e4af9b1e 100644
--- a/src/ext/language_tools.js
+++ b/src/ext/language_tools.js
@@ -162,10 +162,12 @@ require("../config").defineOptions(Editor.prototype, "editor", {
         value: false
     },
     /**
-     * Enable live autocomplete. If the value is an array, it is assumed to be an array of completers
-     * and will use them instead of the default completers.
+     * Enable live autocompletion
      */
     enableLiveAutocompletion: {
+        /**
+         * @param {boolean} val
+         */
         set: function(val) {
             if (val) {
                 if (!this.completers)