Simplify various escaping functions

Simplify regexps that specify ranges of characters to escape with "\xXX"
and "\uXXXX" in various escaping functions. Until now, these regexps
were (mostly) mutually exclusive with more selective regexps applied
before them, but this became a maintenance headache. I decided to
abandon the exclusivity, which allowed to simplify these regexps (at the
cost of introducing an ordering dependency).

lib/compiler/js.js

@@ -24,10 +24,10 @@ var js = {
       .replace(/\n/g,   '\\n')    // line feed
       .replace(/\f/g,   '\\f')    // form feed
       .replace(/\r/g,   '\\r')    // carriage return
-      .replace(/[\x00-\x07\x0B\x0E\x0F]/g, function(ch) { return '\\x0' + hex(ch); })
-      .replace(/[\x10-\x1F\x7F-\xFF]/g,    function(ch) { return '\\x'  + hex(ch); })
-      .replace(/[\u0100-\u0FFF]/g,         function(ch) { return '\\u0' + hex(ch); })
-      .replace(/[\u1000-\uFFFF]/g,         function(ch) { return '\\u'  + hex(ch); });
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x10-\x1F\x7F-\xFF]/g, function(ch) { return '\\x'  + hex(ch); })
+      .replace(/[\u0100-\u0FFF]/g,      function(ch) { return '\\u0' + hex(ch); })
+      .replace(/[\u1000-\uFFFF]/g,      function(ch) { return '\\u'  + hex(ch); });
   },
 
   regexpClassEscape: function(s) {
@@ -48,7 +48,7 @@ var js = {
       .replace(/\v/g, '\\x0B')   // vertical tab
       .replace(/\f/g, '\\f')     // form feed
       .replace(/\r/g, '\\r')     // carriage return
-      .replace(/[\x00-\x08\x0E\x0F]/g,  function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
       .replace(/[\x10-\x1F\x7F-\xFF]/g, function(ch) { return '\\x'  + hex(ch); })
       .replace(/[\u0100-\u0FFF]/g,      function(ch) { return '\\u0' + hex(ch); })
       .replace(/[\u1000-\uFFFF]/g,      function(ch) { return '\\u'  + hex(ch); });

lib/compiler/passes/generate-bytecode.js

@@ -292,8 +292,8 @@ function generateBytecode(ast) {
       .replace(/\t/g, '\\t')    // horizontal tab
       .replace(/\n/g, '\\n')    // line feed
       .replace(/\r/g, '\\r')    // carriage return
-      .replace(/[\x01-\x08\x0B\x0C\x0E\x0F]/g, function(ch) { return '\\x0' + hex(ch); })
-      .replace(/[\x10-\x1F\x7F-\x9F]/g,        function(ch) { return '\\x'  + hex(ch); });
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
   }
 
   function classDescriptionEscape(s) {
@@ -306,8 +306,8 @@ function generateBytecode(ast) {
       .replace(/\t/g, '\\t')    // horizontal tab
       .replace(/\n/g, '\\n')    // line feed
       .replace(/\r/g, '\\r')    // carriage return
-      .replace(/[\x01-\x08\x0B\x0C\x0E\x0F]/g, function(ch) { return '\\x0' + hex(ch); })
-      .replace(/[\x10-\x1F\x7F-\x9F]/g,        function(ch) { return '\\x'  + hex(ch); });
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
   }
 
   var generate = visitor.build({

lib/compiler/passes/generate-js.js

@@ -1085,8 +1085,8 @@ function generateJS(ast, options) {
       '          .replace(/\\t/g,   \'\\\\t\')',       // horizontal tab
       '          .replace(/\\n/g,   \'\\\\n\')',       // line feed
       '          .replace(/\\r/g,   \'\\\\r\')',       // carriage return
-      '          .replace(/[\\x01-\\x08\\x0B\\x0C\\x0E\\x0F]/g, function(ch) { return \'\\\\x0\' + hex(ch); })',
-      '          .replace(/[\\x10-\\x1F\\x7F-\\x9F]/g,        function(ch) { return \'\\\\x\'  + hex(ch); });',
+      '          .replace(/[\\x00-\\x0F]/g,          function(ch) { return \'\\\\x0\' + hex(ch); })',
+      '          .replace(/[\\x10-\\x1F\\x7F-\\x9F]/g, function(ch) { return \'\\\\x\'  + hex(ch); });',
       '      }',
       '',
       '      var expectedDescs = new Array(expected.length),',

lib/parser.js

@@ -542,8 +542,8 @@
             .replace(/\t/g,   '\\t')
             .replace(/\n/g,   '\\n')
             .replace(/\r/g,   '\\r')
-            .replace(/[\x01-\x08\x0B\x0C\x0E\x0F]/g, function(ch) { return '\\x0' + hex(ch); })
-            .replace(/[\x10-\x1F\x7F-\x9F]/g,        function(ch) { return '\\x'  + hex(ch); });
+            .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+            .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
         }
 
         var expectedDescs = new Array(expected.length),