Kill trailing whitespace in scss files

app/assets/stylesheets/common/main_layout.css.scss

@@ -7,62 +7,62 @@ div#search {
 div#page {
   overflow: visible;
   margin: 0 30px;
-  
+
   div#upgrade-account-notice, div#sign-up-notice, div#tos-notice {
     margin: 1em 0;
     padding: 1em;
     text-align: center;
     position: relative;
-    
+
     h1 {
       font-size: $h2_size;
       font-weight: bold;
     }
-    
+
     p {
       margin: 0;
     }
   }
-  
+
   aside#sidebar {
     width: 15em;
     float: left;
     position: absolute;
-    
+
     h1 {
       font-size: $h3_size;
     }
-    
+
     ul {
       list-style-type: none;
     }
-    
+
     input[type=text] {
       width: 10em;
     }
   }
-  
+
   aside#sidebar > section {
     margin-bottom: 1em;
   }
 
   aside#sidebar > section#blacklist-box ul {
     margin-left: 1em;
-    
+
     li {
       list-style-type: disc;
     }
-    
+
     a {
       color: $link_color;
       cursor: pointer;
     }
-    
+
     span {
       color: #AAA;
     }
   }
-  
+
   section#content {
     overflow: visible;
     margin-left: 15em;
@@ -91,4 +91,4 @@ div#more-links {
   padding: 0.2em 0.6em;
   @include box-shadow(2px 2px 2px #ccc);
 }
- 
+