[maoxor]

With --verify, any expression wrapped in two pairs of parentheses is reported as a possible change:

$ echo 'local x = a and ((b >= 1 and b <= 2)) and c' | stylua --verify -
error: could not format from stdin: failed to format from stdin: INTERNAL WARNING: Output AST may be different to input AST. Code correctness may have changed. Please examine the formatting diff and report any issues at https://github.com/johnnymorganz/stylua/issues

The formatter only drops the redundant pair, which is fine, but remove_parentheses in the verifier strips a single level, so the input still has (b >= 1 and b <= 2) where the output has b >= 1 and b <= 2. It now strips every level.

I found it on awesome's spec/awful/prompt_spec.lua ((byte and ((byte >= 194 and byte <= 244)) and ...)). The new test_equivalent_removed_nested_parentheses fails without the change. cargo test passes with the default features, --all-features, --no-default-features, --features luau and --features lua54; clippy (--all-features -D warnings) and cargo fmt --check are clean. A release build with --verify over about 6,000 Lua/Luau files no longer reports any AST difference. The two remaining errors there are the hexadecimal float panic (#1180) and the local -- comment case I added to #1176.

This touches the Unreleased section of the changelog like #1180, so whichever is merged second may need a trivial rebase.