One thing which isn't mentioned here (which i've encountered before) is when conflict tags from source control get thrown into the middle of block comments, and

One thing which isn't mentioned here (which i've encountered before) is when conflict tags from source control get thrown into the middle of block comments, and then committed - which leads to all kinds of headaches. This wouldn't happen with line comments. Additionally.. > This is perfectly cromulent Haskell. I'm still impressed whenever someone can correctly use this word to embiggen the subject under discussion.