Line number tweak for error page

ensure lines are aligned right:
```
 7
 8
 9
10
11
12
...
```

framework/yii/views/errorHandler/main.php

@@ -225,6 +225,8 @@ html,body{
 	position: absolute;
 	z-index: 200;
 	display: block;
+	width: 25px;
+	text-align: right;
 	color: #aaa;
 	line-height: 20px;
 	font-size: 12px;