css: consistent use of empty lines

Signed-off-by: Christian Hesse <mail@eworm.de>

cgit.css

@@ -605,13 +605,16 @@ div#cgit div.footer {
 	font-size: 80%;
 	color: #ccc;
 }
+
 div#cgit div.footer a {
 	color: #ccc;
 	text-decoration: none;
 }
+
 div#cgit div.footer a:hover {
 	text-decoration: underline;
 }
+
 div#cgit a.branch-deco {
 	color: #000;
 	margin: 0px 0.5em;
@@ -619,6 +622,7 @@ div#cgit a.branch-deco {
 	background-color: #88ff88;
 	border: solid 1px #007700;
 }
+
 div#cgit a.tag-deco {
 	color: #000;
 	margin: 0px 0.5em;
@@ -626,6 +630,7 @@ div#cgit a.tag-deco {
 	background-color: #ffff88;
 	border: solid 1px #777700;
 }
+
 div#cgit a.remote-deco {
 	color: #000;
 	margin: 0px 0.5em;
@@ -633,6 +638,7 @@ div#cgit a.remote-deco {
 	background-color: #ccccff;
 	border: solid 1px #000077;
 }
+
 div#cgit a.deco {
 	color: #000;
 	margin: 0px 0.5em;