Clashes with reserved keywords

[g2p]

I can't have a flag called --in.

expected identifier, found keyword `in`

Trying r#in doesn't work either, at least within a subcommand, due to xflags generating subcommand__r#in which doesn't parse.

xflags::xflags! {
    cmd command {
        cmd subcommand {
            required --r#in in: PathBuf
        }
    }
}

[matklad]

Clearly a bug, we should fix to automatically translate keywords into their raw form when generating code. The parser I think already correctly deals with it.