pub fn opt_space<'t, 's: 't, I>() -> impl Parser<'t, I, (), ParserError<'t, 's>> + Clonewhere
I: TokenInput<'t, 's>,Expand description
Match an optional Token::Space.
The token-level replacement for text::whitespace(). Combine it with
Parser::padded_by to replace a top-level .padded().