--- a/static/main.css	Sun Jun 19 14:16:56 2016 +0800
+++ b/static/main.css	Sun Jun 19 14:41:11 2016 +0800
@@ -30,7 +30,7 @@
     background: #4c4c4c;
 }
 
-.check-log div a {
+.check-log a.lineno {
     display: inline-block;
     text-align: right;
     min-width: 42px; /* 4 digits */
@@ -39,7 +39,7 @@
     color: #929292;
 }
 
-.check-log div a::before {
+.check-log a.lineno::before {
     content: attr(data-line-number);
     padding-right: 10px;
 }

--- a/templates/check.html	Sun Jun 19 14:16:56 2016 +0800
+++ b/templates/check.html	Sun Jun 19 14:41:11 2016 +0800
@@ -44,7 +44,7 @@
     <pre class="check-log">{#
     #}{% for number, (cls, line) in enumerate(lines, 1) %}{#
       #}<div id="l{{ number }}"{% if cls %} class="{{ cls }}"{% end %}>{#
-        #}<a href="#l{{ number }}" data-line-number="{{ number }}"></a>{#
+        #}<a href="#l{{ number }}" class="lineno" data-line-number="{{ number }}"></a>{#
         #}{{ line }}{#
       #}</div>{#
     #}{% end %}{#