One newline is enough.

git-svn-id: https://develop.svn.wordpress.org/trunk@19684 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/css/wp-admin.dev.css

@@ -6052,7 +6052,6 @@ a.rsswidget {
 	text-align: center;
 }
 
-
 /* ms */
 /* Dashboard: MS Specific Data */
 #dashboard_right_now p.musub {
@@ -6093,7 +6092,6 @@ a.rsswidget {
 	background: #fecac2;
 }
 
-
 /* nav-menu */
 
 #nav-menus-frame {
@@ -6730,7 +6728,6 @@ body.menu-max-depth-11 { min-width: 1280px !important; }
 	display: block;
 }
 
-
 /* plugin-install */
 /* NOTE: the following CSS rules(.star*) are taken more or less straight from the bbPress rating plugin. */
 div.star-holder {
@@ -7298,7 +7295,6 @@ h3 span {
 	line-height: 180%;
 }
 
-
 /* theme-install */
 .theme-listing .theme-item {
 	display: inline-block;
@@ -7407,7 +7403,6 @@ overflow: auto;
 margin-bottom: 10px;
 }
 
-
 /* widgets */
 
 /* 2 column liquid layout */