Rollup merge of rust-lang#93735 - m-ou-se:stabilize-int-abs-diff, r=joshtriplett

Stabilize int_abs_diff in 1.60.0.

FCP finished here: rust-lang#89492 (comment)

Author: JohnTitor

library/core/src/num/int_macros.rs

@@ -2420,14 +2420,14 @@ macro_rules! int_impl {
         /// Basic usage:
         ///
         /// ```
-        /// #![feature(int_abs_diff)]
         #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".abs_diff(80), 20", stringify!($UnsignedT), ");")]
         #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".abs_diff(110), 10", stringify!($UnsignedT), ");")]
         #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").abs_diff(80), 180", stringify!($UnsignedT), ");")]
         #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").abs_diff(-120), 20", stringify!($UnsignedT), ");")]
         #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.abs_diff(", stringify!($SelfT), "::MAX), ", stringify!($UnsignedT), "::MAX);")]
         /// ```
-        #[unstable(feature = "int_abs_diff", issue = "89492")]
+        #[stable(feature = "int_abs_diff", since = "1.60.0")]
+        #[rustc_const_stable(feature = "int_abs_diff", since = "1.60.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]

library/core/src/num/uint_macros.rs

@@ -1635,11 +1635,11 @@ macro_rules! uint_impl {
         /// Basic usage:
         ///
         /// ```
-        /// #![feature(int_abs_diff)]
         #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".abs_diff(80), 20", stringify!($SelfT), ");")]
         #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".abs_diff(110), 10", stringify!($SelfT), ");")]
         /// ```
-        #[unstable(feature = "int_abs_diff", issue = "89492")]
+        #[stable(feature = "int_abs_diff", since = "1.60.0")]
+        #[rustc_const_stable(feature = "int_abs_diff", since = "1.60.0")]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]