Mark the rest of the unicode feature flag as perma-unstable.

Author: SimonSapin

Diff for: src/liballoc/lib.rs

@@ -113,7 +113,7 @@
 #![feature(trusted_len)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
-#![feature(unicode)]
+#![feature(unicode_internals)]
 #![feature(unsize)]
 #![feature(allocator_internals)]
 #![feature(on_unimplemented)]

Diff for: src/liballoc/tests/lib.rs

@@ -24,7 +24,6 @@
 #![feature(string_retain)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
-#![feature(unicode)]
 #![feature(exact_chunks)]
 #![feature(inclusive_range_fields)]
 

Diff for: src/libcore/unicode/mod.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![unstable(feature = "unicode", issue = "27783")]
+#![unstable(feature = "unicode_internals", issue = "0")]
 #![allow(missing_docs)]
 
 mod bool_trie;

Diff for: src/librustdoc/lib.rs

@@ -20,7 +20,6 @@
 #![feature(fs_read_write)]
 #![feature(set_stdio)]
 #![feature(test)]
-#![feature(unicode)]
 #![feature(vec_remove_item)]
 #![feature(entry_and_modify)]
 

Diff for: src/libstd/lib.rs

@@ -307,7 +307,6 @@
 #![feature(toowned_clone_into)]
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
-#![feature(unicode)]
 #![feature(untagged_unions)]
 #![feature(unwind_attributes)]
 #![feature(vec_push_all)]

Diff for: src/libstd_unicode/lib.rs

@@ -29,7 +29,7 @@
        test(no_crate_inject, attr(allow(unused_variables), deny(warnings))))]
 #![no_std]
 
-#![feature(unicode)]
+#![feature(unicode_internals)]
 #![feature(staged_api)]
 #![rustc_deprecated(since = "1.27.0", reason = "moved into libcore")]
 

Diff for: src/libsyntax/lib.rs

@@ -19,7 +19,7 @@
        html_root_url = "https://doc.rust-lang.org/nightly/",
        test(attr(deny(warnings))))]
 
-#![feature(unicode)]
+#![feature(unicode_internals)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(non_exhaustive)]
 #![feature(const_atomic_usize_new)]