Replace author_link snake case in stylesheets

app/assets/stylesheets/framework/common.scss

@@ -113,8 +113,6 @@ hr {
 
 .item-title { font-weight: $gl-font-weight-bold; }
 
-/** FLASH message **/
-.author_link,
 .author-link {
   color: $gl-link-color;
 }

app/assets/stylesheets/framework/lists.scss

@@ -259,7 +259,7 @@ ul.controls {
       margin-right: 0;
     }
 
-    .author_link {
+    .author-link {
       .avatar-inline {
         margin-left: 0;
         margin-right: 0;

app/assets/stylesheets/pages/detail_page.scss

@@ -10,7 +10,7 @@
   }
 
   .issue_created_ago,
-  .author_link {
+  .author-link {
     white-space: nowrap;
   }
 

app/assets/stylesheets/pages/issuable.scss

@@ -197,7 +197,7 @@
     }
 
     &.assignee {
-      .author_link {
+      .author-link {
         display: block;
         padding-left: 42px;
         position: relative;

app/assets/stylesheets/pages/issues.scss

@@ -12,7 +12,7 @@
     }
 
     .issuable-meta {
-      .author_link {
+      .author-link {
         display: inline-block;
       }
 

app/assets/stylesheets/pages/notes.scss

@@ -403,7 +403,7 @@ ul.notes {
     }
   }
 
-  .author_link {
+  .author-link {
     color: $gl-text-color;
   }
 }