Fix lint errors

app/assets/stylesheets/framework/files.scss

@@ -21,7 +21,7 @@
     text-align: left;
     padding: 10px $gl-padding;
     word-wrap: break-word;
-    border-radius: 3px 3px 0px 0px;
+    border-radius: 3px 3px 0 0;
 
     .file-actions {
       float: right;

app/assets/stylesheets/framework/variables.scss

@@ -81,7 +81,7 @@ $provider-btn-not-active-color: #4688f1;
 
 $white-light: #fff;
 $white-normal: #ededed;
-$white-dark: #ECECEC;
+$white-dark: #ececec;
 
 $gray-light: #faf9f9;
 $gray-normal: #f5f5f5;
@@ -203,8 +203,8 @@ $dropdown-toggle-hover-icon-color: $dropdown-toggle-hover-border-color;
 /*
 * Buttons
 */
-$btn-active-gray: #ECECEC;
-$btn-placeholder-gray: #C7C7C7;
+$btn-active-gray: #ececec;
+$btn-placeholder-gray: #c7c7c7;
 $btn-white-active: #848484;
 
 /*

app/helpers/notes_helper.rb

@@ -69,9 +69,7 @@ module NotesHelper
       line_type:     line_type
     }
 
-    button_tag class: 'btn btn-text-field js-discussion-reply-button',
-               data: data, title: 'Add a reply' do
-      link_text = 'Reply...'
-    end
+    button_tag 'Reply...', class: 'btn btn-text-field js-discussion-reply-button',
+                           data: data, title: 'Add a reply'
   end
 end