Zeddotes Enhanced Code Block adds inspector controls to the WordPress core Code block:
- Language select with Prism.js highlighting in the editor and on the frontend
- Optional line numbers
- Tab key indents inside the block (Shift+Tab outdents); optional spaces instead of tabs
- Configurable tab size (2 / 4 / 8)
- Optional copy button before or after the code block, aligned left / center / right (or hidden)
No separate block type — authors keep using the standard Code block.