Refactor LT tests for parsers: string

The tests for the parsing of line terminators were expressed using eval.
This made the tests more complex than necessary and also prevented the
tests from providing value to ECMAScript parsers.

Remove the use of eval and instead express the expectations with literal
source text.

test/language/line-terminators/S7.3_A2.2_T1.js → test/language/line-terminators/invalid-string-cr.js

@@ -4,9 +4,13 @@
 /*---
 info: CARRIAGE RETURN (U+000D) within strings is not allowed
 es5id: 7.3_A2.2_T1
+esid: sec-line-terminators
 description: Insert CARRIAGE RETURN (\u000D) into string
+negative:
+  phase: parse
+  type: SyntaxError
 ---*/
 
-assert.throws(SyntaxError, function() {
-  eval("'\u000Dstr\u000Ding\u000D'");
-});
+$DONOTEVALUATE();
+
+''

test/language/line-terminators/S7.3_A2.1_T1.js → test/language/line-terminators/invalid-string-lf.js

@@ -4,9 +4,14 @@
 /*---
 info: LINE FEED (U+000A) within strings is not allowed
 es5id: 7.3_A2.1_T1
+esid: sec-line-terminators
 description: Insert LINE FEED (\u000A) into string
+negative:
+  phase: parse
+  type: SyntaxError
 ---*/
 
-assert.throws(SyntaxError, function() {
-  eval("'\u000Astr\u000Aing\u000A'");
-});
+$DONOTEVALUATE();
+
+'
+'