Vertical line present in code block when specifying language

[sameemul-haque]

When specifying a language in code blocks, a vertical line appears in those code blocks but not in others. I have attached a screenshot demonstrating this issue. Code block 1 displays the vertical line, while code block 2 does not.

This issue is also present on the demo site: https://rooms.netlify.app/posts/emoji-support/