Apply De Morgan's Law misses precedence of operations

[l4l]

Assist apply_demorgan for a && !(a && b) pointed at second operation produces a && !a || !b which is incorrect because the precedence of || is missed. Or more formally as a test:

#[test]
fn demorgan_keep_pars_for_op_precedence1() {
    check_assist(
        apply_demorgan,
        "fn f() { (a && !(b &&$0 c); }",
        "fn f() { (a && (!b || !c); }",
    );
}

Related #15239.

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rust-analyzer version: rust-analyzer 1.76.0 (07dca48 2024-02-04)

rustc version: rustc 1.76.0 (07dca489a 2024-02-04)

editor or extension: helix

[roife]

@rustbot claim