Small improvements to code rendering for white highlight

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/generic/files.scss

@@ -60,7 +60,6 @@
 
       .highlight {
         margin-bottom: 9px;
-        @include border-radius(4px);
 
         > pre {
           margin: 0;

app/assets/stylesheets/highlight/white.scss

 .white {
-  background-color: #fff;
-
   .line.hll {
     background: #FFA;
   }
 
-  .highlight{
-    border-left: 1px solid #eee;
-  }
-
   pre {
     background-color: #fff;
     color: #333;
@@ -179,8 +173,16 @@
   @include box-shadow(0 5px 15px #000);
 }
 
-.wiki, .note-body {
+.file-content {
+  &.code .white {
     .highlight {
-    border: 1px solid #DDD;
+      border-left: 1px solid #eee;
+    }
+  }
+
+  &.wiki .white {
+    .highlight, pre, .hljs {
+      background: #F9F9F9;
+    }
   }
 }