Handling of private (non-`#[macro_export]`) declarative macros is broken

https://stackoverflow.com/a/31749071/2398020

If you have a non-`#[macro_export]` macro that you want to use in multiple modules, the conventional way to do this is `pub(crate) use my_macro;` but stageleft turns this into `pub use my_macro` which results in an error (since `#[macro_export]` is missing). Workaround is to add `#[macro_export] #[doc(hidden)]` to make it public but hidden