changes as per comments

https://github.com/mrclay/minify/pull/496#discussion_r50247608

lib/Minify/Source/Factory.php

@@ -110,20 +110,20 @@ class Minify_Source_Factory {
         return $realpath;
     }
 
-
     /**
-     * @param string $path
+     * turn windows-style slashes into unix-style,
+     * remove trailing slash
+     * and lowercase drive letter
+     *
+     * @param string $path absolute path
+     *
      * @return string
      */
     public function getNormalizedPath($path)
     {
-        // turn windows-style slashes into unix-style,
-        // remove trailing slash
-        // and lowercase drive letter
         return lcfirst(rtrim(str_replace('\\', '/', $path), '/'));
     }
 
-
     /**
      * @param mixed $spec
      *