Merge pull request #69 from mozillazg/patch-1

fix a typo

Author: SunLn

demo/views/index.html

@@ -52,7 +52,7 @@ <h1 class="text-left col-md-12 ">
             <div id="container">
                 <a class="btn btn-default btn-lg " id="pickfiles" href="#" >
                     <i class="glyphicon glyphicon-plus"></i>
-                    <sapn>选择文件</sapn>
+                    <span>选择文件</span>
                 </a>
             </div>
         </div>