Re: [PATCH 2/6] ci: check formatting of our Rust code

> On 2025-10-07 at 17:13:18, Eric Sunshine wrote:
> > Later in the same thread, I wrote[2]:
> > 
> >     Project guidelines have long suggested 80 columns as a desirable
> >     maximum not only for C code, but for pretty much all other
> >     resources, including shell code, Perl code, and documentation
> >     files. This suggested maximum works well for adherents of
> >     80-columns and (presumably) hasn't been too onerous for developers
> >     who use wider windows; at least we haven't heard people clamoring
> >     to increase the suggested maximum column limit. As such, it does
> >     not seem far-fetched to expect that the project guidelines
> >     should/could/would also apply to Rust code.
> 
> My preference is actually that we stick with the default.  I use (and
> for a long time have used) a 132-character editor window and I find it
> quite useful to have the extra space.  The DEC VT100 did 132 columns
> (available on your local Linux system as `vt100-w`), so I think there's
> plenty of precedent for that being an acceptable width[0].
> 
> I did previously use 80-column terminals when I had a tiny laptop
> screen, but modern display resolutions over the past decade, even on
> smaller laptops, have made it entirely possible to get several wider
> terminal windows (or in my case, tmux panes) on one screen.  One of my
> current tmux panes is now 213×54 and I really enjoy the extra space.
> 
> The default Rust behaviour is 100 characters[1], which I think is a fine
> default.  I won't be enormously angsty if we say we still absolutely
> must stick to 80-character lines, but I also think we should take this
> opportunity to choose the Rust defaults for Rust.  C, Perl, and text
> formats like AsciiDoc do not have rigid defaults about indentation
> style, tabs vs. spaces, and line length; Rust does.  We wouldn't use
> tabs in Rust (the default is four spaces) because we use it everywhere
> else, so I think we should take the opportunity to use the Rust defaults
> here as well.