When asking matching bracket, we check all pending brackets have been closed in plain text:

let mut open_cnt = 1;
for (i, candidate) in chars_iter.take(MAX_PLAINTEXT_SCAN).enumerate() {
    if candidate == bracket {
        open_cnt += 1;
    } else if candidate == matching_bracket {
        if open_cnt == 1 {
            return Some(if is_fwd {
                cursor_pos + i + 1
            } else {
                cursor_pos - i - 1
            });
        }
        open_cnt -= 1;
    }
}

And we didn't check it if there an tree-sitter for this language.
However, some language's indents.scm may be rudimentary. If there is multiple matching brackets within the same node, the indents will become incorrect. This PR add this check so that the indents are at least as good as when there is no language support available.

An example in protobuf, write following intest.proto:

And after the fix: