Escape vertical tab as "\v", not "\x0B"

See #441.

examples/javascript.pegjs

@@ -312,7 +312,7 @@ SingleEscapeCharacter
   / "n"  { return "\n"; }
   / "r"  { return "\r"; }
   / "t"  { return "\t"; }
-  / "v"  { return "\x0B"; }   // IE does not recognize "\v".
+  / "v"  { return "\v"; }
 
 NonEscapeCharacter
   = !(EscapeCharacter / LineTerminator) SourceCharacter { return text(); }

lib/compiler/js.js

@@ -12,8 +12,6 @@ var js = {
      * may appear in the form of an escape sequence.
      *
      * For portability, we also escape all control and non-ASCII characters.
-     * Note that the "\v" escape sequence is not used because IE does not like
-     * it.
      */
     return s
       .replace(/\\/g,   '\\\\')   // backslash
@@ -22,6 +20,7 @@ var js = {
       .replace(/\x08/g, '\\b')    // backspace
       .replace(/\t/g,   '\\t')    // horizontal tab
       .replace(/\n/g,   '\\n')    // line feed
+      .replace(/\v/g,   '\\v')    // vertical tab
       .replace(/\f/g,   '\\f')    // form feed
       .replace(/\r/g,   '\\r')    // carriage return
       .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
@@ -45,7 +44,7 @@ var js = {
       .replace(/\0/g, '\\0')    // null
       .replace(/\t/g, '\\t')    // horizontal tab
       .replace(/\n/g, '\\n')    // line feed
-      .replace(/\v/g, '\\x0B')   // vertical tab
+      .replace(/\v/g, '\\v')    // vertical tab
       .replace(/\f/g, '\\f')    // form feed
       .replace(/\r/g, '\\r')    // carriage return
       .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })

lib/parser.js

@@ -260,8 +260,8 @@ function peg$parse(input, options) {
       peg$c35 = peg$otherExpectation("whitespace"),
       peg$c36 = "\t",
       peg$c37 = peg$literalExpectation("\t", false),
-      peg$c38 = "\x0B",
-      peg$c39 = peg$literalExpectation("\x0B", false),
+      peg$c38 = "\v",
+      peg$c39 = peg$literalExpectation("\v", false),
       peg$c40 = "\f",
       peg$c41 = peg$literalExpectation("\f", false),
       peg$c42 = " ",
@@ -368,7 +368,7 @@ function peg$parse(input, options) {
       peg$c120 = function() { return "\t"; },
       peg$c121 = "v",
       peg$c122 = peg$literalExpectation("v", false),
-      peg$c123 = function() { return "\x0B"; },
+      peg$c123 = function() { return "\v"; },
       peg$c124 = "x",
       peg$c125 = peg$literalExpectation("x", false),
       peg$c126 = "u",

spec/unit/parser.spec.js

@@ -384,7 +384,7 @@ describe("PEG.js grammar parser", function() {
   /* Canonical WhiteSpace is " ". */
   it("parses WhiteSpace", function() {
     expect('start =\t"abcd"'    ).toParseAs(trivialGrammar);
-    expect('start =\x0B"abcd"'  ).toParseAs(trivialGrammar);   // no "\v" in IE
+    expect('start =\v"abcd"'    ).toParseAs(trivialGrammar);
     expect('start =\f"abcd"'    ).toParseAs(trivialGrammar);
     expect('start = "abcd"'     ).toParseAs(trivialGrammar);
     expect('start =\u00A0"abcd"').toParseAs(trivialGrammar);
@@ -596,7 +596,7 @@ describe("PEG.js grammar parser", function() {
     expect('start = "\\n"' ).toParseAs(literalGrammar("\n", false));
     expect('start = "\\r"' ).toParseAs(literalGrammar("\r", false));
     expect('start = "\\t"' ).toParseAs(literalGrammar("\t", false));
-    expect('start = "\\v"' ).toParseAs(literalGrammar("\x0B", false));   // no "\v" in IE
+    expect('start = "\\v"' ).toParseAs(literalGrammar("\v", false));
   });
 
   /* Canonical NonEscapeCharacter is "a". */

src/parser.pegjs

@@ -409,7 +409,7 @@ SingleEscapeCharacter
   / "n"  { return "\n"; }
   / "r"  { return "\r"; }
   / "t"  { return "\t"; }
-  / "v"  { return "\x0B"; }   // IE does not recognize "\v".
+  / "v"  { return "\v"; }
 
 NonEscapeCharacter
   = !(EscapeCharacter / LineTerminator) SourceCharacter { return text(); }