Allow '=' within the body of --tla-code

[expelledboy]

Purpose

Allow base64 encoded values, and large JSON strings that include "=" characters in the body

I had no idea how to test this, so I built it and ran it within the scope of my work

First piece of Rust code I've ever written :)

Thank you for this project! 🫶

[JarvisCraft]

Congratulations on joining the rustaceans club and thanks for your PR!

I suggest that you try adding a unit-test to ensure that this behavior is correct (and does not break with future changes). You can look into rust book to see basic tutorial on writing unit tests in Rust. Alternatively, you could make a doc test by writing a doc-comment with a code example in it which would also be run by Cargo.

[CertainLach]

Thanks!