Auto merge of #49724 - kennytm:range-inc-start-end-methods, r=Kimundi

Introduce RangeInclusive::{new, start, end} methods and make the fields private.

cc #49022

diff --cc src/liballoc/lib.rs
index 881607f65ba654c71e97ff42d28cfa1e36e90ee3,c94fe2a2f837d750e67842e9297ee546e02dcf85..da4b76a4d527d41ee755812ffae464e780e2e4c4
--- 1/src/liballoc/lib.rs
--- 2/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@@ -122,9 -122,8 +122,9 @@@
  #![feature(on_unimplemented)]
  #![feature(exact_chunks)]
  #![feature(pointer_methods)]
- #![feature(inclusive_range_fields)]
+ #![feature(inclusive_range_methods)]
  #![cfg_attr(stage0, feature(generic_param_attrs))]
 +#![feature(rustc_const_unstable)]
  
  #![cfg_attr(not(test), feature(fn_traits, i128))]
  #![cfg_attr(test, feature(test))]

diff --cc src/libcore/lib.rs
Simple merge