Only escape U+0022 in argument values of `String.prototype` HTML methods

test/mjsunit/es6/string-html.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Tests taken from:
 // http://mathias.html5.org/tests/javascript/string/
 
 assertEquals('_'.anchor('b'), '<a name="b">_</a>');
-//assertEquals('<'.anchor('<'), '<a name="<"><</a>'); // #2217
+assertEquals('<'.anchor('<'), '<a name="<"><</a>');
 assertEquals('_'.anchor(0x2A), '<a name="42">_</a>');
 assertEquals('_'.anchor('\x22'), '<a name="&quot;">_</a>');
 assertEquals(String.prototype.anchor.call(0x2A, 0x2A), '<a name="42">42</a>');
 assertThrows(function() {
   String.prototype.anchor.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.anchor.call(null);
 }, TypeError);
 assertEquals(String.prototype.anchor.length, 1);
@@ skipping 36 matching lines @@
 assertEquals(String.prototype.fixed.call(0x2A), '<tt>42</tt>');
 assertThrows(function() {
   String.prototype.fixed.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.fixed.call(null);
 }, TypeError);
 assertEquals(String.prototype.fixed.length, 0);
 
 assertEquals('_'.fontcolor('b'), '<font color="b">_</font>');
-//assertEquals('<'.fontcolor('<'), '<font color="<"><</font>'); // #2217
+assertEquals('<'.fontcolor('<'), '<font color="<"><</font>');
 assertEquals('_'.fontcolor(0x2A), '<font color="42">_</font>');
 assertEquals('_'.fontcolor('\x22'), '<font color="&quot;">_</font>');
 assertEquals(String.prototype.fontcolor.call(0x2A, 0x2A),
   '<font color="42">42</font>');
 assertThrows(function() {
   String.prototype.fontcolor.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.fontcolor.call(null);
 }, TypeError);
 assertEquals(String.prototype.fontcolor.length, 1);
 
 assertEquals('_'.fontsize('b'), '<font size="b">_</font>');
-//assertEquals('<'.fontsize('<'), '<font size="<"><</font>'); // #2217
+assertEquals('<'.fontsize('<'), '<font size="<"><</font>');
 assertEquals('_'.fontsize(0x2A), '<font size="42">_</font>');
 assertEquals('_'.fontsize('\x22'), '<font size="&quot;">_</font>');
 assertEquals(String.prototype.fontsize.call(0x2A, 0x2A),
   '<font size="42">42</font>');
 assertThrows(function() {
   String.prototype.fontsize.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.fontsize.call(null);
 }, TypeError);
 assertEquals(String.prototype.fontsize.length, 1);
 
 assertEquals('_'.italics(), '<i>_</i>');
 assertEquals('<'.italics(), '<i><</i>');
 assertEquals(String.prototype.italics.call(0x2A), '<i>42</i>');
 assertThrows(function() {
   String.prototype.italics.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.italics.call(null);
 }, TypeError);
 assertEquals(String.prototype.italics.length, 0);
 
 assertEquals('_'.link('b'), '<a href="b">_</a>');
-//assertEquals('<'.link('<'), '<a href="<"><</a>'); // #2217
+assertEquals('<'.link('<'), '<a href="<"><</a>');
 assertEquals('_'.link(0x2A), '<a href="42">_</a>');
 assertEquals('_'.link('\x22'), '<a href="&quot;">_</a>');
 assertEquals(String.prototype.link.call(0x2A, 0x2A), '<a href="42">42</a>');
 assertThrows(function() {
   String.prototype.link.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.link.call(null);
 }, TypeError);
 assertEquals(String.prototype.link.length, 1);
@@ skipping 34 matching lines @@
 assertEquals('_'.sup(), '<sup>_</sup>');
 assertEquals('<'.sup(), '<sup><</sup>');
 assertEquals(String.prototype.sup.call(0x2A), '<sup>42</sup>');
 assertThrows(function() {
   String.prototype.sup.call(undefined);
 }, TypeError);
 assertThrows(function() {
   String.prototype.sup.call(null);
 }, TypeError);
 assertEquals(String.prototype.sup.length, 0);