Rollup merge of rust-lang#132499 - RalfJung:unicode_data.rs, r=tgross35

unicode_data.rs: show command for generating file

rust-lang#131647 made this an easily runnable tool, now we just have to mention that in the comment. :)

Fixes rust-lang#131640.

Author: workingjubilee

library/core/src/unicode/unicode_data.rs

@@ -1,4 +1,4 @@
-///! This file is generated by src/tools/unicode-table-generator; do not edit manually!
+///! This file is generated by `./x run src/tools/unicode-table-generator`; do not edit manually!
 
 #[inline(always)]
 const fn bitset_search<

src/tools/unicode-table-generator/src/main.rs

@@ -268,7 +268,7 @@ fn main() {
     let mut table_file = String::new();
 
     table_file.push_str(
-        "///! This file is generated by src/tools/unicode-table-generator; do not edit manually!\n",
+        "///! This file is generated by `./x run src/tools/unicode-table-generator`; do not edit manually!\n",
     );
 
     // Include the range search function