Address PR

Kanchalai Tanglertsampan · Kanchalai Tanglertsampan · commit b499a03416b1 · 2016-01-26T16:14:02.000-08:00
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
@@ -232,8 +232,8 @@ namespace ts {
 
     // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
     export function escapeIdentifier(identifier: string): string {
-        const prefixWithUnderscore = identifier.length > 2 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._;
-        return prefixWithUnderscore ? "_" + identifier : identifier;
+        const prefixedWithUnderscores = identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._;
+        return prefixedWithUnderscores ? "_" + identifier : identifier;
     }
 
     // Remove extra underscore from escaped identifier

Original file line number	Diff line number	Diff line change
`@@ -232,8 +232,8 @@ namespace ts {`
`232`	`232`
`233`	`233`	`// Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'`
`234`	`234`	`export function escapeIdentifier(identifier: string): string {`
`235`		`- const prefixWithUnderscore = identifier.length > 2 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._;`
`236`		`- return prefixWithUnderscore ? "_" + identifier : identifier;`
	`235`	`+ const prefixedWithUnderscores = identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._;`
	`236`	`+ return prefixedWithUnderscores ? "_" + identifier : identifier;`
`237`	`237`	`}`
`238`	`238`
`239`	`239`	`// Remove extra underscore from escaped identifier`