Turned all 0x1b_u8.into() into '\x1b' in the docs

[mahmoud-moursy]

Housekeeping to keep docs clean and up to date -- turned all instances of 0x1b_u8.into() into \x1b when I stumbled upon this in the Rust docs.

Tested these changes using this code:

fn main() {
    let esc: char = 0x1b_u8.into();
    let esc_2 = '\x1b';
    
    assert_eq!(esc, esc_2);
}

It exited and returned code 0.

[rust-highfive]

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

Please see the contribution instructions for more information.

[wooster0]

There seem to be more occurrences in https://github.com/rust-lang/rust/blob/master/library/core/src/num/mod.rs like for example:

    /// let lf = b'\n';
    /// let esc = 0x1b_u8;
    ///

Do you want to turn those into b'\x1b'?

[mahmoud-moursy]

Do you want to turn those into b'\x1b'?

I would love to, but traversing the entirety of Rust's source code to find these instances would take me a lot of time.

[wooster0]

@T-O-R-U-S there are actually not that many. Here's what I meant: #91044

[bors]

☔ The latest upstream changes (presumably #91064) made this pull request unmergeable. Please resolve the merge conflicts.

[m-ou-se]

Closing this, since #91044 has already been merged.