comment_width is ignored when bigger than max_width

[konstin]

When comment_width is set to a larger value than max_width, comment_width is still bound by max_width. Take the following project:

rustfmt.toml

wrap_comments = true
comment_width = 1234

main.rs

/// Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore
fn main() {
    println!("Hello, world!");
}

The doc comment is fine according to the comment width, but still wrapped as it is longer than 100 characters:

/// Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt
/// ut labore
fn main() {
    println!("Hello, world!");
}

The use case I have for this is that I want to format only the code samples in the comments, but not comments itself. (I'm working on pyo3 which has lots of wide doc comments that are wrapped incorrectly with the default comment_width, but which also have many code samples that should be properly formatted.)

rustfmt -V: rustfmt 0.99.2-nightly (5c9a2b6 2018-08-07)

[scampi]

I think if you remove wrap_comments and use the option format_doc_comments, you get what you want: it formats the doc test but leaves the comment alone.

[scampi]

fixed by #3535