Fix some examples failing compilation

[zjeffer]

• Fix hyprland::bind!() warnings in examples/bind.rs because the Result was not being checked
• Fix typo in some generated methods (change => changed), I assume the macro changed at some point?
• I also took care of some clippy warnings (2nd commit)

I noticed the bind test still fails though:

---- config::test_binds stdout ----
thread 'config::test_binds' panicked at src/config.rs:269:5:
assertion `left == right` failed
  left: "SUPER,v,togglefloating"
 right: "SUPER,v,/togglefloating"

I'm not sure what the fix would be here? Does Binder::gen_str need to be updated to include the /, or should the expected value (right) be without the /?

[yavko]

I'll take a look at how to fix that test in a bit