fix link highlighting in markdown headers

lib/ace/mode/_test/text_markdown.txt

@@ -12,8 +12,9 @@ test: # followed be only space is not a valid header
 test: only space between #s is not a valid header
 #  #
 
-test links  [Cloud9 IDE](http://www.c9.io/) 
+# test links  [Cloud9 IDE](http://www.c9.io/) #
 * [demo](http://ajaxorg.github.com/ace/) 
 in lists
 
-in plain text <b>http://ace.ajaxorg.com<b>
+in plain text <b>http://ace.ajaxorg.com<b>
+

lib/ace/mode/_test/tokens_markdown.json

@@ -3,25 +3,29 @@
   ["text","test: header 1 "]
 ],[
    "start",
-  ["markup.heading.1","#f"]
+  ["markup.heading.1","#"],
+  ["markup.heading","f"]
 ],[
    "start",
   ["text","test: header 2"]
 ],[
    "start",
-  ["markup.heading.2","## foo"]
+  ["markup.heading.2","##"],
+  ["markup.heading"," foo"]
 ],[
    "start",
   ["text","test: header ends with ' #'"]
 ],[
    "start",
-  ["markup.heading.1","# # # "]
+  ["markup.heading.1","#"],
+  ["markup.heading"," # # "]
 ],[
    "start",
   ["text","test: header ends with '#'"]
 ],[
    "start",
-  ["markup.heading.1","#foo# "]
+  ["markup.heading.1","#"],
+  ["markup.heading","foo# "]
 ],[
    "start",
   ["text","test: 6+ #s is not a valid header"]
@@ -41,13 +45,14 @@
    "allowBlock"
 ],[
    "start",
-  ["text","test links  "],
+  ["markup.heading.1","#"],
+  ["markup.heading"," test links  "],
   ["text","["],
   ["string","Cloud9 IDE"],
   ["text","]("],
   ["markup.underline","http://www.c9.io/"],
   ["text",")"],
-  ["text"," "]
+  ["markup.heading"," #"]
 ],[
    "listblock",
   ["markup.list","* "],
@@ -72,4 +77,8 @@
   ["meta.tag","<"],
   ["meta.tag.tag-name","b"],
   ["meta.tag.r",">"]
+],[
+   "allowBlock"
+],[
+   "start"
 ]]

lib/ace/mode/markdown_highlight_rules.js

@@ -100,11 +100,12 @@ var MarkdownHighlightRules = function() {
         }, { // h2
             token: "markup.heading.2",
             regex: "^\\-+(?=\\s*$)"
-        }, { // header
+        }, {
             token : function(value) {
-                return "markup.heading." + value.search(/[^#]/);
+                return "markup.heading." + value.length;
             },
-            regex : "^#{1,6}(?:[^ #].*| +.*(?:[^ #].*|[^ ]+.* +#+ *))$"
+            regex : /^#{1,6}(?=\s*[^ #]|\s+#.)/,
+            next : "header"
         },
            github_embed("(?:javascript|js)", "js-"),
            github_embed("xml", "xml-"),
@@ -129,6 +130,15 @@ var MarkdownHighlightRules = function() {
         }, {
             include : "basic"
         }],
+        
+        "header" : [{
+            regex: "$",
+            next : "start"
+        }, {
+            include: "basic"
+        }, {
+            defaultToken : "markup.heading"
+        } ],
 
         "listblock-start" : [{
             token : "support.variable",