`\rightarrow (...)` is converted to `arrow.r(...)` instead of `arrow.r (...)`

[e-zz]

Thank you for sharing the project.

When testing the package, I find \rightarrow (...) is converted to arrow.r(...) instead of arrow.r (...) (Note the space after r).

use tex2typst_rs::tex2typst_with_macros;
fn main() {
    let tex = r"A \rightarrow (B+C)";

    println!("{}", tex2typst_with_macros(tex, macros).unwrap());
}