support '.' in filenames

Author: cloudhead

lib/assert/error.js

@@ -3,7 +3,7 @@ var inspect = require('vows/console').inspect;
 
 require('assert').AssertionError.prototype.toString = function () {
     var that = this,
-        source = this.stack.match(/([a-zA-Z0-9_-]+\.js)(:\d+):\d+/);
+        source = this.stack.match(/([a-zA-Z0-9._-]+\.js)(:\d+):\d+/);
 
     function parse(str) {
         return str.replace(/{actual}/g,   inspect(that.actual)).