Method chain formatting produces long long first line

[casey]

I was going to title this issue "long expression has weird formatting", but then I realized that 99% of rustfmt issues could probably be described thusly :P

I got the following from rustfmt today:

  let matches = App::new(env!("CARGO_PKG_NAME")).version(concat!("v", env!("CARGO_PKG_VERSION")))
    .author(env!("CARGO_PKG_AUTHORS"))
    .about(concat!(env!("CARGO_PKG_DESCRIPTION"),
                   " - ",
                   env!("CARGO_PKG_HOMEPAGE")))
    .setting(AppSettings::ColoredHelp)
    .get_matches_from_safe(args)?;

This strikes me as fine except for the first line, which seems weird, even though it's under my ideal width of 100 characters.

I would have expected and preferred:

  let matches = App::new(env!("CARGO_PKG_NAME"))
    .version(concat!("v", env!("CARGO_PKG_VERSION")))
    .author(env!("CARGO_PKG_AUTHORS"))
    .about(concat!(env!("CARGO_PKG_DESCRIPTION"),
                   " - ",
                   env!("CARGO_PKG_HOMEPAGE")))
    .setting(AppSettings::ColoredHelp)
    .get_matches_from_safe(args)?;

This seems like a bug to me.

[nrc]

This is somewhat intentional, though is likely to change with the new fmt RFCs.

[nrc]

Closing since it is not really a bug, and is only actionable as part of larger, already tracked work

[casey]

Ah, I see.

Can you link to the RFC (or RFC PR) in question?

[nrc]

Discussion of how to format should be discussed here: rust-lang/style-team#66

I'm doing a lot of refactoring in this area which is not really tracked anywhere.