Tweak macros module

src/macros.rs

 //! A macro for defining #[cfg] if-else statements.
 //!
-//! The macro provided by this crate, `cfg_if`, is similar to the `if/elif` C
-//! preprocessor macro by allowing definition of a cascade of `#[cfg]` cases,
-//! emitting the implementation which matches first.
+//! This is similar to the `if/elif` C preprocessor macro by allowing definition
+//! of a cascade of `#[cfg]` cases, emitting the implementation which matches
+//! first.
 //!
 //! This allows you to conveniently provide a long list #[cfg]'d blocks of code
 //! without having to rewrite each clause multiple times.
@@ -21,7 +21,6 @@ macro_rules! cfg_if {
     }
 }
 
-#[doc(hidden)]
 macro_rules! __cfg_if_items {
     (($($not:meta,)*) ; ) => {};
     (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
@@ -30,7 +29,6 @@ macro_rules! __cfg_if_items {
     }
 }
 
-#[doc(hidden)]
 macro_rules! __cfg_if_apply {
     ($m:meta, $($it:item)*) => {
         $(#[$m] $it)*