diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 989ba47445a..888ff6e8c6c 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7378,7 +7378,7 @@ namespace ts {
         function getJsxElementInstanceType(node: JsxOpeningLikeElement) {
             // There is no such thing as an instance type for a non-class element. This
             // line shouldn't be hit.
-            Debug.assert(!!(getNodeLinks(node).jsxFlags & JsxFlags.ClassElement), 'Should not call getJsxElementInstanceType on non-class Element');
+            Debug.assert(!!(getNodeLinks(node).jsxFlags & JsxFlags.ClassElement), "Should not call getJsxElementInstanceType on non-class Element");
 
             let classSymbol = getJsxElementTagSymbol(node);
             if (classSymbol === unknownSymbol) {
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 0a9aa90b7ae..9a984b9a2f1 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -423,7 +423,7 @@ namespace ts {
                     fileNames = map(<string[]>json["files"], s => combinePaths(basePath, s));
                 }
                 else {
-                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, 'files', 'Array'));                    
+                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));                    
                 }
             }
             else {
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
index 379177a9b9c..7db8f243192 100644
--- a/src/compiler/scanner.ts
+++ b/src/compiler/scanner.ts
@@ -660,9 +660,9 @@ namespace ts {
             ch >= CharacterCodes._0 && ch <= CharacterCodes._9 || ch === CharacterCodes.$ || ch === CharacterCodes._ ||
             ch > CharacterCodes.maxAsciiCharacter && isUnicodeIdentifierPart(ch, languageVersion);
     }
-
+
     /* @internal */
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
     export function createScanner(languageVersion: ScriptTarget,
                                   skipTrivia: boolean,
                                   languageVariant = LanguageVariant.Standard,
@@ -1121,7 +1121,7 @@ namespace ts {
 
                 // Special handling for shebang
                 if (ch === CharacterCodes.hash && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text ,pos);
+                    pos = scanShebangTrivia(text, pos);
                     if (skipTrivia) {
                         continue;
                     }
diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 0b3ae07816b..296b489f0c4 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -2497,7 +2497,7 @@ module FourSlash {
     }
 
     function containTSConfigJson(files: FourSlashFile[]): boolean {
-        return ts.forEach(files, f => f.fileOptions['Filename'] === 'tsconfig.json');
+        return ts.forEach(files, f => f.fileOptions["Filename"] === "tsconfig.json");
     }
 
     function getNonFileNameOptionInFileList(files: FourSlashFile[]): string {