---- test_fixup stdout ----
    thread 'test_fixup' panicked at tests/test_expr.rs:716:9:
    original: (# [attr] thing) . field
    reconstructed: # [attr] thing . field

Lower the precedence of expressions containing outer attrs

    ---- test_fixup stdout ----
    thread 'test_fixup' panicked at tests/test_expr.rs:717:9:
    original: (self . f) ()
    reconstructed: self . f ()

Fix parenthesization of field expressions in function calls

Improve test_unparenthesize to catch more false negatives