message: Fix rustdoc compile warning
  rustdoc does not generate documentation for macro expansions
diff: @@ -1663,9 +1663,8 @@ impl<'a> WindowMode<'a> {
  }
  }
  -/// Key modifiers (e.g., Shift, Control, Alt, Super)
  bitflags! {
  - #[doc = "Key modifiers"]
  + #[doc = "Key modifiers (e.g., Shift, Control, Alt, Super)"]
  pub struct Modifiers: ::libc::c_int {
  const Shift = ::ffi::MOD_SHIFT;
  const Control = ::ffi::MOD_CONTROL;
  @@ -2626,7 +2625,6 @@ impl GamepadAxis {
  }
  }
  -/// Joystick hats.
  bitflags! {
  #[doc = "Joystick hats."]
  pub struct JoystickHats: ::libc::c_int {
  