diff --git a/src/services/formatting/formattingContext.ts b/src/services/formatting/formattingContext.ts
index 72fc7bf80fb..2bfb155921e 100644
--- a/src/services/formatting/formattingContext.ts
+++ b/src/services/formatting/formattingContext.ts
@@ -33,11 +33,11 @@ module ts.formatting {
         }
 
         public updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node) {
-            Debug.assert(currentRange != null, "currentTokenSpan is null");
-            Debug.assert(currentTokenParent != null, "currentTokenParent is null");
-            Debug.assert(nextRange != null, "nextTokenSpan is null");
-            Debug.assert(nextTokenParent != null, "nextTokenParent is null");
-            Debug.assert(commonParent != null, "commonParent is null");
+            Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
+            Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
+            Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
+            Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
+            Debug.assert(commonParent !== undefined, "commonParent is null");
 
             this.currentTokenSpan = currentRange;
             this.currentTokenParent = currentTokenParent;
diff --git a/src/services/formatting/ruleDescriptor.ts b/src/services/formatting/ruleDescriptor.ts
index 0a9a5285133..e5b7d6f3186 100644
--- a/src/services/formatting/ruleDescriptor.ts
+++ b/src/services/formatting/ruleDescriptor.ts
@@ -34,7 +34,6 @@ module ts.formatting {
         }
 
         static create3(left: SyntaxKind, right: Shared.TokenRange): RuleDescriptor
-            //: this(TokenRange.FromToken(left), right)
         {
             return RuleDescriptor.create4(Shared.TokenRange.FromToken(left), right);
         }
diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index 34ed2b74d91..4b42591936e 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -450,44 +450,6 @@ module ts.formatting {
                 case SyntaxKind.BinaryExpression:
                 case SyntaxKind.ConditionalExpression:
                     return true;
-                //// binary expressions
-                //case SyntaxKind.AssignmentExpression:
-                //case SyntaxKind.AddAssignmentExpression:
-                //case SyntaxKind.SubtractAssignmentExpression:
-                //case SyntaxKind.MultiplyAssignmentExpression:
-                //case SyntaxKind.DivideAssignmentExpression:
-                //case SyntaxKind.ModuloAssignmentExpression:
-                //case SyntaxKind.AndAssignmentExpression:
-                //case SyntaxKind.ExclusiveOrAssignmentExpression:
-                //case SyntaxKind.OrAssignmentExpression:
-                //case SyntaxKind.LeftShiftAssignmentExpression:
-                //case SyntaxKind.SignedRightShiftAssignmentExpression:
-                //case SyntaxKind.UnsignedRightShiftAssignmentExpression:
-                //case SyntaxKind.ConditionalExpression:
-                //case SyntaxKind.LogicalOrExpression:
-                //case SyntaxKind.LogicalAndExpression:
-                //case SyntaxKind.BitwiseOrExpression:
-                //case SyntaxKind.BitwiseExclusiveOrExpression:
-                //case SyntaxKind.BitwiseAndExpression:
-                //case SyntaxKind.EqualsWithTypeConversionExpression:
-                //case SyntaxKind.NotEqualsWithTypeConversionExpression:
-                //case SyntaxKind.EqualsExpression:
-                //case SyntaxKind.NotEqualsExpression:
-                //case SyntaxKind.LessThanExpression:
-                //case SyntaxKind.GreaterThanExpression:
-                //case SyntaxKind.LessThanOrEqualExpression:
-                //case SyntaxKind.GreaterThanOrEqualExpression:
-                //case SyntaxKind.InstanceOfExpression:
-                //case SyntaxKind.InExpression:
-                //case SyntaxKind.LeftShiftExpression:
-                //case SyntaxKind.SignedRightShiftExpression:
-                //case SyntaxKind.UnsignedRightShiftExpression:
-                //case SyntaxKind.MultiplyExpression:
-                //case SyntaxKind.DivideExpression:
-                //case SyntaxKind.ModuloExpression:
-                //case SyntaxKind.AddExpression:
-                //case SyntaxKind.SubtractExpression:
-                //    return true;
 
                 // equal in import a = module('a');
                 case SyntaxKind.ImportDeclaration: