Changes

• fix(filter/highlight): avoid escaping curly bracket when highlight & prismjs disabled @curbengh [#4489]
  • When both highlight.js and prismjs are disabled:

  # _config.yml
  highlight:
    enable: false
  
  prismjs
    enable: false
  

  • there was an issue that curly brackets { } are escaped { } mistakenly in the backtick_code_block.js filter. The fix is to avoid running that filter when code highlight is disabled.
  • Some users disable Hexo's default code highlight as they prefer to their own method.