remove u00a0. fixes markedjs#52 and possibly markedjs#81.

Author: chjj

lib/marked.js

@@ -119,7 +119,9 @@ Lexer.lex = function(src, options) {
 Lexer.prototype.lex = function(src) {
   src = src
     .replace(/\r\n|\r/g, '\n')
-    .replace(/\t/g, '    ');
+    .replace(/\t/g, '    ')
+    .replace(/\u00a0/g, ' ')
+    .replace(/\u2424/g, '\n');
 
   return this.token(src, true);
 };