Add `if_same_then_else`

[0xLucqs]

What it does

Checks for if/else with the same body as the then part and the else part.

Why is this bad?

This is probably a copy & paste error.

Example

let foo = if … {
    42
} else {
    42
};

[Gianfranco99]

Hello! I'd like to take this issue. I have a background in Cairo and I'm familiar with spotting these kinds of redundancy issues.

[onlydustapp[bot]]

Hey @Gianfranco99! Thanks for showing interest. We've created an application for you to contribute to Cairo lint. Go check it out on OnlyDust!

[fishonamos]

Hi @0xLucqs . I will take this one as discussed.

[onlydustapp[bot]]

Hey @fishonamos! Thanks for showing interest. We've created an application for you to contribute to Cairo lint. Go check it out on OnlyDust!