Proposed rule: enforce typography

[flodolo]

Here's a few checks that I would like to have:

• quotes: use proper “” instead of "".
• apostrophes: use proper apostrophes ’ instead of '.
• punctuation_space: enforce one space after a punctuation symbol, unless it's followed by a new line.
• double_spaces: no double spaces.

I think code should be excluded by default for all these checks.

For the first two, Atom has a really nice package that might be used as inspiration.

[DavidAnson]

Double spaces was already on my list. :) Punctuation space seems fine.

But quotes worries me. The package you link to changes normal quotes to smart ones - but emphasizes that you still type dumb quotes the easy way. markdownlint is not a transformer like that. I think nobody will want to have to type smart quotes every time in order to satisfy this rule. Or am I thinking about this part wrong?

[flodolo]

I think nobody will want to have to type smart quotes every time in order to satisfy this rule. Or am I thinking about this part wrong?

Yes, you would either be writing the correct quotes directly, or use a package like the one above to make your life easier.

I realize that this might not be a useful rule for a lot of users, it sounds more like good material for a custom rule.

[DavidAnson]

It fits within the bigger idea of a typography rule, but maybe this part would default to "off". I like the idea to bundle these similar checks, though.

[CircleCode]

Please also note that these rules can depend on text language.
For example, in French

• you would have to enforce a non breakable space before every double punctuation sign (; : !)
• valid quotes are « and »

[kdeldycke]

Checks on properly balanced quotes and the way they terminates sentences is what I'n trying to achieve at: sindresorhus/awesome-lint#101 . Only managed to create a set of use-cases at the moment.