expansion: Improve searchability for AstFragments methods

src/libsyntax/lib.rs

@@ -19,13 +19,14 @@
        html_root_url = "https://doc.rust-lang.org/nightly/",
        test(attr(deny(warnings))))]
 
-#![feature(unicode_internals)]
+#![feature(const_atomic_usize_new)]
+#![feature(crate_visibility_modifier)]
+#![feature(macro_at_most_once_rep)]
+#![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]
-#![feature(const_atomic_usize_new)]
-#![feature(rustc_attrs)]
 #![feature(str_escape)]
-#![feature(crate_visibility_modifier)]
+#![feature(unicode_internals)]
 
 #![recursion_limit="256"]