diff --git a/lib/ace/edit_session/folding.js b/lib/ace/edit_session/folding.js
index 36565555..d6a08102 100644
--- a/lib/ace/edit_session/folding.js
+++ b/lib/ace/edit_session/folding.js
@@ -714,7 +714,7 @@ function Folding() {
             // sometimes singleline folds can be missed by the code above
             if (!range.isMultiLine()) {
                 fold = this.getFoldAt(range.start.row, range.start.column, 1);
-                if (fold && range.isEequal(fold.range)) {
+                if (fold && range.isEqual(fold.range)) {
                     this.removeFold(fold);
                     return;
                 }
diff --git a/lib/ace/range.js b/lib/ace/range.js
index 16e88f9c..163979fe 100644
--- a/lib/ace/range.js
+++ b/lib/ace/range.js
@@ -51,7 +51,7 @@ var Range = function(startRow, startColumn, endRow, endColumn) {
 };
 
 (function() {
-    this.isEequal = function(range) {
+    this.isEqual = function(range) {
         return this.start.row == range.start.row &&
             this.end.row == range.end.row &&
             this.start.column == range.start.column &&
@@ -117,6 +117,11 @@ var Range = function(startRow, startColumn, endRow, endColumn) {
         return this.comparePoint(range.start) == 0 && this.comparePoint(range.end) == 0;
     }
 
+    this.intersectsRange = function(range) {
+        var cmp = this.compareRange(range);
+        return (cmp == -1 || cmp == 0 || cmp == 1);
+    }
+
     this.isEnd = function(row, column) {
         return this.end.row == row && this.end.column == column;
     }
@@ -276,6 +281,21 @@ var Range = function(startRow, startColumn, endRow, endColumn) {
         return Range.fromPoints(start || this.start, end || this.end);
     };
 
+    this.fixOrientation = function() {
+        if (
+            this.start.row < this.end.row 
+            || (this.start.row == this.end.row && this.start.column < this.end.column)
+        ) {
+            return false;
+        }
+        
+        var temp = this.start;
+        this.end = this.start;
+        this.start = temp;
+        return true;
+    };
+
+
     this.isEmpty = function() {
         return (this.start.row == this.end.row && this.start.column == this.end.column);
     };