fix linting

fix linting

diff --git a/app/assets/stylesheets/common/base/_topic-list.scss b/app/assets/stylesheets/common/base/_topic-list.scss
index 98d484f..2bf7e0c 100644
--- a/app/assets/stylesheets/common/base/_topic-list.scss
+++ b/app/assets/stylesheets/common/base/_topic-list.scss
@@ -287,7 +287,7 @@ ol.category-breadcrumb {
 
 .top-title-buttons {
   display: inline-flex;
-  margin: .25em 0;
+  margin: 0.25em 0;
 
   button {
     margin-right: 0.5em;

GitHub sha: bae813fa

This commit appears in #9642 which was merged by jjaffeux.