change sourceurl usage

[tj]

not sure why we're not just evaling on the fn.toString() haha... my bad, this looks too ugly:

\n\
  /**\n\
   * Running flag.\n\
   */\n\
\n\
  var running;\n\
\n\
  /**\n\
   * Register `path` with callback `fn()`,\n\
   * or route `path`, or `page.start()`.\n\
   *\n\
   *   page(fn);\n\
   *   page('*', fn);\n\
   *   page('/user/:id', load, user);\n\
   *   page('/user/' + user.id, { some: 'thing' });\n\
   *   page('/user/' + user.id);\n\
   *   page();\n\
   *\n\
   * @param {String|Function} path\n\
   * @param {Function} fn...\n\
   * @api public\n\
   */\n\
\n\
  function page(path, fn) {\n\
    // <callback>\n\
    if ('function' == typeof path) {\n\
      return page('*', path);\n\

[dominicbarnes]

Where tabs are used, a bunch of \t are in there as well, even uglier. :(