Factor out duplicated p.info CSS.

`p.info` is used to render "Updated by so-and-so 5 minutes ago" messages as fine print.

app/assets/stylesheets/common/020_base.scss

@@ -128,3 +128,9 @@ table tfoot {
   font-size: 0.8em;
   color: gray;
 }
+
+p.info {
+  color: #AAA;
+  font-style: italic;
+  font-size: 80%;
+}

app/assets/stylesheets/specific/comments.scss

@@ -5,12 +5,6 @@ div.comments-for-post {
     margin: 1em 0;
   }
 
-  p.info {
-    color: #AAA;
-    font-style: italic;
-    font-size: 80%;
-  }
-
   div.list-of-comments {
     article.comment {
       margin-bottom: 2em;

app/assets/stylesheets/specific/forum.scss

@@ -1,10 +1,4 @@
 div.list-of-forum-posts {
-  p.info {
-    color: #AAA;
-    font-style: italic;
-    font-size: 80%;
-  }
-
   article {
     border: 1px solid #AAA;
     margin: 1em 0em;
@@ -41,12 +35,6 @@ div.list-of-forum-posts {
 }
 
 div#c-forum-topics {
-  p.info {
-    color: #AAA;
-    font-style: italic;
-    font-size: 80%;
-  }
-
   div.single-forum-post {
   }
 

app/assets/stylesheets/specific/user_name_change_requests.scss

@@ -19,12 +19,6 @@
     margin: 0;
   }
   
-  p.author {
-    font-size: 80%;
-    font-style: italic;
-    color: #AAA;
-  }
-  
   section {
     margin-bottom: 1em;
   }

app/views/user_name_change_requests/show.html.erb

@@ -48,7 +48,7 @@
         <% @change_request.feedback.each do |feedback| %>
           <li class="feedback-category-<%= feedback.category %>">
             <p><%= feedback.body %></p>
-            <p class="author">Submitted by <%= link_to_user feedback.creator.name %> <%= time_ago_in_words_tagged feedback.created_at %></p>
+            <p class="info">Submitted by <%= link_to_user feedback.creator.name %> <%= time_ago_in_words_tagged feedback.created_at %></p>
           </li>
         <% end %>
       </ul>