Apply suggestions from code review

Co-authored-by: Jan Haller <[email protected]>

Author: TitanNano

godot-core/src/builtin/signal.rs

@@ -39,7 +39,7 @@ impl Signal {
         T: GodotClass,
         S: Into<StringName>,
     {
-        let signal = signal_name.into();
+        let signal_name = signal_name.into();
         unsafe {
             sys::from_sys_init_or_init_default::<Self>(|self_ptr| {
                 let ctor = sys::builtin_fn!(signal_from_object_signal);
@@ -57,7 +57,7 @@ impl Signal {
     ///
     /// A signal can only be connected once to the same [`Callable`]. If the signal is already connected,
     /// returns [`Error::ERR_INVALID_PARAMETER`] and
-    /// pushes an error message, unless the signal is connected with [`ConnectFlags::CONNECT_REFERENCE_COUNTED`](crate::engine::object::ConnectFlags::CONNECT_REFERENCE_COUNTED).
+    /// pushes an error message, unless the signal is connected with [`ConnectFlags::CONNECT_REFERENCE_COUNTED`](crate::engine::object::ConnectFlags::REFERENCE_COUNTED).
     /// To prevent this, use [`Self::is_connected`] first to check for existing connections.
     pub fn connect(&self, callable: Callable, flags: i64) -> Error {
         let error = self.as_inner().connect(callable, flags);
@@ -162,7 +162,7 @@ unsafe impl GodotFfi for Signal {
         sys::VariantType::Signal
     }
 
-    ffi_methods! { type sys::GDExtensionTypePtr =  *mut Opaque;
+    ffi_methods! { type sys::GDExtensionTypePtr = *mut Opaque;
         fn from_sys;
         fn sys;
         fn from_sys_init;