I searched both CE and EE issue trackers but I didn't see a duplicate for this, I apologize if that is not the case. ### Summary When putting a url in a comment which contains multiple `__`, the url is prematurely ended in order to format the text between them as bold. For example: https://gitlab.com/pycqa/flake8/blob/master/src/flake8/__init__.py#L1 (this will render correctly when this is fixed) `https://gitlab.com/pycqa/flake8/blob/master/src/flake8/__init__.py#L1` should be a single url with the `__` preserved in the url. At the time of writing this, the above url instead looks something like `<a>https://gitlab.com/pycqa/flake8/blob/master/src/flake8/</a><bold>init</bold>.py#L1` and the actual href is also wrong, not just the rendering of it. ### Steps to reproduce Put a url containing more than one set of `__` with text between them in a comment and post it. ### Example Project The link above to a file in pycqa/flake8 should be example enough I think. ### What is the current *bug* behavior? The url is not automatically linked correctly, instead it ends where the formatting begins. ### What is the expected *correct* behavior? The url should be complete, and the formatting behavior of the `__` should be ignored. ### Relevant logs and/or screenshots Here is a screenshot of the incorrect rendering:  ### Output of checks This bug happens on GitLab.com. ### Possible fixes I don't have any insight into where this might be fixed, but I imagine it comes down to automatic url creation needs to take precedence over text formatting, or that urls need to be excluded from text formatting.