Incorrect help message for bad tuple indexing on parenthesised array

[varkor]

fn main() {
    let x = [0u32];
    (x as [u32; 1]).0
}

The help message suggests:

help: instead of using tuple indexing, use array indexing: `x as [u32; 1][0]`

The parentheses have gone missing.

This is related to #56714.

[zackmdavis]

This kind of thing (compare to e.g. #55109) happens when we use the pretty printer to synthesize suggestions.

rust/src/librustc_typeck/check/mod.rs

Lines 3375 to 3377 in d99a320

	let base = self.tcx.hir().node_to_pretty_string(base.id);
	let help = "instead of using tuple indexing, use array indexing";
	let suggestion = format!("{}[{}]", base, field);