优化 code 样式细节

src/css/modules/code.css

@@ -2,8 +2,7 @@
  * code
  */
 
-/* 加载就绪标志 */
-html #layuicss-skincodecss{display:none; position: absolute; width:1989px;}
+html #layuicss-skincodecss{display: none; position: absolute; width: 1989px;}
 
 /* 字体  */
 .layui-code-wrap{font-size: 13px; font-family: "Courier New",Consolas,"Lucida Console";}
@@ -48,7 +47,6 @@ html #layuicss-skincodecss{display:none; position: absolute; width:1989px;}
 .layui-code-preview > .layui-code-view{margin: 0;}
 .layui-code-preview > .layui-tab{position: relative; z-index: 1; margin-bottom: 0;}
 .layui-code-preview > .layui-tab > .layui-tab-title{border-width: 0;}
-.layui-code-preview > .layui-code-view > .layui-code-header{display: none;}
 .layui-code-preview .layui-code-item{display: none;}
 .layui-code-preview .layui-code-view > .layui-code-lines > .layui-code-line{}
 .layui-code-item-preview{position: relative; padding: 16px; overflow: auto;}

src/modules/code.js

@@ -597,5 +597,5 @@ layui.define(['lay', 'util', 'element', 'form'], function(exports){
 
 // 若为源码版，则自动加载该组件依赖的 css 文件
 if(!layui['layui.all']){
-  layui.addcss('modules/code.css?v=3', 'skincodecss');
+  layui.addcss('modules/code.css?v=6', 'skincodecss');
 }