Fix copy icon spacing

Author: josevalim

assets/css/content/general.css

@@ -148,7 +148,7 @@
   transition: opacity .3s ease-in-out;
   display: inline-block;
   opacity: 0;
-  padding: .3em .6em .6em;
+  padding: .3em .4em .6em .6em;
   line-height: 1em;
   margin-left: -2.4em;
   text-decoration: none;