rust-mode.el: check for possible space between variable name and type

[Hi-Angel]

Fixes the following problem: consider code

fn foo(a: u32, b : u32) {}

Here, b was not highlighted as a variable, because the regex didn't
take into account possible space before the colon.

Signed-off-by: Konstantin Kharlamov Hi-Angel@yandex.ru

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @nikomatsakis (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[Hi-Angel]

Err, rather "before" the colon… Let me fix the description in a moment

[Hi-Angel]

Done

[mookid]

It looks ok. Could you add some tests?

edit: it reminded me of something, because of #274 :)

[Hi-Angel]

It looks ok. Could you add some tests?

Sure, done.

[Hi-Angel]

Although, wait a moment, I figured I shouldn't add this test to an existing one, but rather create a separate test. Let me fix this

[Hi-Angel]

Done

[Hi-Angel]

edit: it reminded me of something, because of #274 :)

Sorry, didn't see the edit. That's cool btw, our code changes are pretty similar :) Why did you close it back then?

[mookid]

because there was no answer, I thought that there was no interest.

I will merge once tests pass.

[Hi-Angel]

because there was no answer, I thought that there was no interest.

Well, it's a bugfix after all. They usually are boring, which doesn't make them less useful :)

The font-lock-variable-face is important for users of color-identifiers mode, which makes such discrepancy pretty visible.

[Hi-Angel]

I think there's a bug with Travis CI: while this page says lots of builds are queued,

but if you click any link in them, for example 422.6, it says it already passed:

[mookid]

thanks!