Merge pull request #7925 from Microsoft/correctStrictPrologueCheckToTransforms

Correct strict prologue check to transforms

tests/baselines/reference/useStrictLikePrologueString01.js

@@ -0,0 +1,14 @@
+//// [useStrictLikePrologueString01.ts]
+
+"hey!"
+" use strict "
+export function f() {   
+}
+
+//// [useStrictLikePrologueString01.js]
+"hey!";
+" use strict ";
+"use strict";
+function f() {
+}
+exports.f = f;

tests/baselines/reference/useStrictLikePrologueString01.symbols

@@ -0,0 +1,7 @@
+=== tests/cases/compiler/useStrictLikePrologueString01.ts ===
+
+"hey!"
+" use strict "
+export function f() {   
+>f : Symbol(f, Decl(useStrictLikePrologueString01.ts, 2, 14))
+}

tests/baselines/reference/useStrictLikePrologueString01.types

@@ -0,0 +1,11 @@
+=== tests/cases/compiler/useStrictLikePrologueString01.ts ===
+
+"hey!"
+>"hey!" : string
+
+" use strict "
+>" use strict " : string
+
+export function f() {   
+>f : () => void
+}

tests/cases/compiler/useStrictLikePrologueString01.ts

@@ -0,0 +1,7 @@
+//@target: commonjs
+//@target: es5
+
+"hey!"
+" use strict "
+export function f() {   
+}