collect code content without line numbers and connect together with single line breaks

Author: rosieyohannan

ui/src/js/04-copy-to-clipboard.js

@@ -53,7 +53,20 @@
   }
 
   function writeToClipboard (code) {
-    var text = code.innerText.replace(TRAILING_SPACE_RX, '')
+    var text
+    // Check if this is a line-numbered code block (table structure)
+    var table = code.querySelector('table.hljs-ln')
+    if (table) {
+      // Extract text only from code cells (not line number cells)
+      var codeCells = table.querySelectorAll('td.hljs-ln-code')
+      text = Array.prototype.slice.call(codeCells).map(function (cell) {
+        return cell.textContent
+      }).join('\n')
+    } else {
+      // Fallback to original method for non-line-numbered blocks
+      text = code.innerText
+    }
+    text = text.replace(TRAILING_SPACE_RX, '')
     if (code.dataset.lang === 'console' && text.startsWith('$ ')) text = extractCommands(text)
     window.navigator.clipboard.writeText(text).then(
       function () {