do not use library class

src/client/styles/scss/_page.scss

@@ -68,12 +68,10 @@
       }
 
       .revision-history-diff {
+        display: table !important;
+        width: 100%;
         padding-left: 40px;
         color: #333;
-      }
-
-      .d2h-files-diff {
-        display: table;
         table-layout: fixed;
       }
     }