Fix rust Alt comments

[ARM9]

/// are single line documentation comments.

[alerque]

Hey @ARM9 thanks for taking the time to contribute. You're probably right here and I'm no expert on Rust, but before I blow it away can you give me a brief explanation here? The previous contributor that set this entry up linked to this page in the docs that says nothing about /* */ style block comments. What's going on here?

[alerque]

Hey @Ilphrin, any comment on this?

[ARM9]

I see, that page seems to omit multiline comments for some reason (perhaps they don't update it regularly). See https://doc.rust-lang.org/reference.html#comments

[alerque]

I can buy that. @Ilphrin and anybody else that prefers the docstring comment format as the alternate, you can set it up in your vimrc file like this:

let g:NERDCustomDelimiters = { 'rust': { 'left': '//', 'altLeft': '///' }

[Ilphrin]

Great! :) I didn't know if there is a way to manage all kind of Rust's comments, but the common syntax is cool, thanks!