Problem
When copying (using either select and copy or the copy icon) a line of code like
atlantis apply
and then pasting it into GitLabs comment field the contents get enclosed in backticks like `atlantis apply`
Solution
GitLab tries to be helpful and adds that to make pasting with formatting (the default on all modern systems) easier.
in this case we need it without formatting, so doing a paste without formatting works.
On MacOS: Shift + Command + V
On Windows/Linux: Ctrl + Shift + v