Fixed copy-to-clipboard adding blank lines when using line anchors (8.1.0 regression)

Author: squidfunk

material/assets/stylesheets/main.840a26e4.min.css

@@ -34,7 +34,7 @@
       {% endif %}
     {% endblock %}
     {% block styles %}
-      <link rel="stylesheet" href="{{ 'assets/stylesheets/main.fc338f16.min.css' | url }}">
+      <link rel="stylesheet" href="{{ 'assets/stylesheets/main.840a26e4.min.css' | url }}">
       {% if config.theme.palette %}
         {% set palette = config.theme.palette %}
         <link rel="stylesheet" href="{{ 'assets/stylesheets/palette.dc90facb.min.css' | url }}">

material/assets/stylesheets/main.840a26e4.min.css.map

@@ -204,9 +204,12 @@
   // Code block line anchors - Chrome and Safari seem to have a strange bug
   // where scroll margin is not applied to anchors inside code blocks. Setting
   // positioning to absolute seems to fix the problem. Interestingly, this does
-  // not happen in Firefox.
+  // not happen in Firefox. Furthermore we must set `visibility: hidden` or
+  // the copy to clipboard functionality will include an empty line between
+  // each set of lines.
   code a[id] {
     position: absolute;
+    visibility: hidden;
   }
 }
 

material/assets/stylesheets/main.fc338f16.min.css

@@ -63,7 +63,7 @@
   }
 
   // Button on focus/hover
-  &:where(:focus, :hover) {
+  &:is(:focus, :hover) {
     color: var(--md-accent-fg-color);
   }