Fixed highlighted lines adding blank lines when copying

material/base.html

@@ -34,7 +34,7 @@
       {% endif %}
     {% endblock %}
     {% block styles %}
-      <link rel="stylesheet" href="{{ 'assets/stylesheets/main.052bca4c.min.css' | url }}">
+      <link rel="stylesheet" href="{{ 'assets/stylesheets/main.edf004c2.min.css' | url }}">
       {% if config.theme.palette %}
         {% set palette = config.theme.palette %}
         <link rel="stylesheet" href="{{ 'assets/stylesheets/palette.e6a45f82.min.css' | url }}">
@@ -213,7 +213,7 @@
       </script>
     {% endblock %}
     {% block scripts %}
-      <script src="{{ 'assets/javascripts/bundle.adc5bf89.min.js' | url }}"></script>
+      <script src="{{ 'assets/javascripts/bundle.9ab3d63a.min.js' | url }}"></script>
       {% for path in config["extra_javascript"] %}
         <script src="{{ path | url }}"></script>
       {% endfor %}

src/assets/javascripts/integrations/clipboard/index.ts

@@ -52,24 +52,14 @@ interface SetupOptions {
 /**
  * Extract text to copy
  *
- * This function hides annotations prior to extracting the text from the given
- * code block, so they're not included in the text that is copied to clipboard.
- *
  * @param el - HTML element
  *
  * @returns Extracted text
  */
 function extract(el: HTMLElement): string {
-  const annotations = getElements(".md-annotation", el)
-  for (const annotation of annotations)
-    annotation.hidden = true
-
-  /* Extract text and show annotations */
+  el.setAttribute("data-md-copying", "")
   const text = el.innerText
-  for (const annotation of annotations)
-    annotation.hidden = false
-
-  /* Return extracted text */
+  el.removeAttribute("data-md-copying")
   return text
 }
 

src/assets/stylesheets/main/extensions/pymdownx/_highlight.scss

@@ -210,6 +210,21 @@
     position: absolute;
     visibility: hidden;
   }
+
+  // Copying in progress - this class is set before the content is copied and
+  // removed after copying is done to mitigate whitespace-related issues.
+  code[data-md-copying] {
+
+    // Remove highlighted lines - see https://bit.ly/32iVGWh
+    .hll {
+      display: contents;
+    }
+
+    // Remove code annotation
+    .md-annotation {
+      display: none;
+    }
+  }
 }
 
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