fix markdown padding

public/css/gogs.css

   font-size: 16px;
   line-height: 1.6 !important;
   word-wrap: break-word;
+}
+.markdown.file-view {
   padding: 5px 2em 2em !important;
 }
 .markdown > *:first-child {

public/less/_markdown.less

   font-size: 16px;
   line-height: 1.6 !important;
   word-wrap: break-word;
-  padding: 5px 2em 2em !important;
+
+  &.file-view {
+    padding: 5px 2em 2em !important;
+  }
 
   >*:first-child {
     margin-top: 0 !important;

templates/repo/view_file.tmpl

     {{end}}
   </h4>
   <div class="ui attached table segment">
-    <div class="{{if .ReadmeExist}}markdown{{else if .IsFileText}}code-view{{end}}">
+    <div class="file-view {{if .ReadmeExist}}markdown{{else if .IsFileText}}code-view{{end}}">
       {{if .ReadmeExist}}
       {{if .FileContent}}{{.FileContent | Str2html}}{{end}}
         {{else if not .IsFileText}}