CommitView: Don't always display a horizontal scrollbar

This is based on work from Ben Alpert.

Author: pieter

html/diff_style.css

@@ -33,6 +33,7 @@ pre code {
 	margin: 5px;
 	margin-left: 20px;
 	font-family: Monaco;
+	width: auto;
 }
 
 #CurrentHunk {
@@ -55,5 +56,6 @@ table.diff {
 	padding-right: 2px;
 	background-color: #ECECEC;
 	color: #A9A9A9;
-	border: 1px solid #A9A9A9;
+	border: 1px solid #DDDDDD;
+	text-align: right;
 }