fix: clip hover state breaking column layout

fixes #1739

assets/stylesheets/components/_content.scss

@@ -398,7 +398,12 @@
   padding: .375rem;
   cursor: pointer;
 
-  pre:hover > & { display: block; }
+  pre:hover > & {
+    display: block;
+    top: 0.1875rem;
+    padding: 0;
+  }
+
   &:hover { opacity: 1; }
 
   > svg {