DOC: Remove duplicate "pre" formatting.

doc/source/themes/agogo/static/agogo.css_t

@@ -113,11 +113,6 @@ img {
   border: 0;
 }
 
-pre {
-  background-color: #EEE;
-  padding: 0.5em;
-}
-
 div.admonition {
   margin-top: 10px;
   margin-bottom: 10px;
@@ -579,7 +574,7 @@ p.admonition-title:after {
 }
 
 pre {
-    padding: 5px;
+    padding: 1em;
     background-color: {{ theme_codebgcolor }};
     color: {{ theme_codetextcolor }};
     line-height: 120%;

doc/source/themes/agogo/theme.conf

@@ -15,4 +15,5 @@ linkcolor = #FC852B
 headercolor1 = #555
 headercolor2 = #555
 headerlinkcolor = #fcaf3e
+codebgcolor = #EEE
 textalign = justify