Index: src/wp-content/themes/twentytwelve/editor-style.css
===================================================================
--- src/wp-content/themes/twentytwelve/editor-style.css	(revision 41322)
+++ src/wp-content/themes/twentytwelve/editor-style.css	(working copy)
@@ -17,6 +17,7 @@
 	line-height: 1;
 	text-rendering: optimizeLegibility;
 	vertical-align: baseline;
+	line-height: 1.714285714;
 }