Rollup merge of #134834 - dtolnay:unnamedcall, r=compiler-errors

Skip parenthesis around tuple struct field calls

The pretty-printer previously did not distinguish between named vs unnamed fields when printing a function call containing a struct field. It would print the call as `(self.fun)()` for a named field which is correct, and `(self.0)()` for an unnamed field which is redundant.

This PR changes function calls of tuple struct fields to print without parens.

**Before:**

```rust
struct Tuple(fn());

fn main() {
    let tuple = Tuple(|| {});
    (tuple.0)();
}
```

**After:**

```rust
struct Tuple(fn());

fn main() {
    let tuple = Tuple(|| {});
    tuple.0();
}
```

0 files changed, 0 insertions, 0 deletions