Function read_verbatim_char

pub fn read_verbatim_char<'a, Pa: ParseSource<'a>, T: FromLaTeXToken<'a, Pa::Pos, Pa::Str>, Err: FnMut(String, SourceRange<Pa::Pos>, DiagnosticLevel), State: ParserState<'a, Pa, T, Err>>(
    mac: &mut Macro<'a, Pa::Pos, Pa::Str>,
    p: &mut LaTeXParser<'a, Pa, T, Err, State>,
    end: char,
)