Method push

crates/sith_python_parser/src/lexer.rs:1640–1648

(&mut self, c: char)

    }

    fn push(&mut self, c: char) {
        match self {
            LexedText::Source { range, source } => {
                *range = range.add_end(c.text_len());
                debug_assert!(source[*range].ends_with(c));
            }
            LexedText::Owned(owned) => owned.push(c),
        }
    }

    fn as_str<'b>(&'b self) -> &'b str
    where