Use line comment for 'commentstring'#522
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'commentstring'is used by Neovim in a way that line comments seem more fitting.Additionally, there is a quirk/bug of Neovim that interacts badly with Lean's comment syntax and can cause unterminated comments to show up.
To reproduce, perform a visual selection accross paragraphs, including an empty line. Then comment it out using
gcc. The empty line will be left with/--/, which in Lean is the start of a doc comment, without a corresponding end of the comment, so the remainder of the file gets read as a comment. The quirk is that the spaces around%sseem to be ignored for empty lines.