change doc phrasing

Author: mj10021

library/core/src/primitive_docs.rs

@@ -1675,7 +1675,7 @@ mod prim_fn {}
 #[cfg(doc)]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[doc(fake_variadic)]
-/// This trait is implemented on function pointers with any number of arguments.
+/// This trait is implemented on all function pointers.
 impl<Ret, T> Clone for fn(T) -> Ret {
     fn clone(&self) -> Self {
         loop {}
@@ -1686,7 +1686,7 @@ impl<Ret, T> Clone for fn(T) -> Ret {
 #[cfg(doc)]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[doc(fake_variadic)]
-/// This trait is implemented on function pointers with any number of arguments.
+/// This trait is implemented on all function pointers.
 impl<Ret, T> Copy for fn(T) -> Ret {
     // empty
 }
@@ -1699,7 +1699,7 @@ impl<Ret, T> Copy for fn(T) -> Ret {
     reason = "internal trait for implementing various traits for all function pointers"
 )]
 #[doc(fake_variadic)]
-/// This trait is implemented on function pointers with any number of arguments.
+/// This trait is implemented on all function pointers.
 impl<Ret, T> FnPtr for fn(T) -> Ret {
     fn addr(self) -> *const () {
         // empty