Ticket #40956: 40956.2.diff

src/wp-content/themes/twentytwelve/editor-style.css

@@ -14 +14 @@
         font-family: "Open Sans", Helvetica, Arial, sans-serif;
         font-size: 14px;
         font-size: 1rem;
-        line-height: 1;
+        line-height: 1.714285714;
         text-rendering: optimizeLegibility;
         vertical-align: baseline;
 }