Auto merge of #13975 - DropDemBits:on-enter-after-dot-chains, r=DropDemBits

fix: Suppress extra indent after the end of field and function chains

(spurred on by <https://github.com/rust-lang/rust-analyzer/issues/4182#issuecomment-671275652>)

Caveat that this doesn't work for after tail expressions, although there shouldn't be anything after those anyways.

This also complicates when to reload the language configuration by nature of now always having a language configuration applicable.

Examples of indentation fixes:

```rs
fn main() {
    println!("Hello!"); // < enter here!
    // ... indents down here

    fs::read_to_string("soup") // < enter here!
    // ... still indents down here :(
        .map(|_| ())
        .map(|_| ()) // < enter here!
        // ... still indents down here :D
        .map_err(|_| ())
        .unwrap(); // < enter here!
    // ... indents down here :D

    // ... and subsequent enters stay at the same indent

    0.0f64
        .to_radians()
        .to_radians()
        .to_radians() // force semi on a new line
        ; // < enter here!
    // ... indents down here :D
}

fn tail_end() -> i32 {
    0i32.wrapping_abs()
        .wrapping_abs()
        .wrapping_abs()
        .wrapping_abs() // < enter here!
        // ... still indents here :shrug:
}
```

0 files changed, 0 insertions, 0 deletions