Fix unicode_data.rs mention message

Author: Urgau

triagebot.toml

@@ -1003,11 +1003,11 @@ cc = ["@calebzulawski", "@programmerjake"]
 
 [mentions."library/core/src/unicode/unicode_data.rs"]
 message = """
-`library/core/src/unicode/unicode_data.rs` is generated by
-`src/tools/unicode-table-generator` via `./x run
-src/tools/unicode-table-generator`. If you want to modify `unicode_data.rs`,
-please modify the tool then regenerate the library source file with the tool
-instead of editing the library source file manually.
+`library/core/src/unicode/unicode_data.rs` is generated by the \
+`src/tools/unicode-table-generator` tool via `./x run src/tools/unicode-table-generator`.
+
+If you want to modify `unicode_data.rs`, please modify the tool then regenerate the library \
+source file with the tool instead of editing the library source file manually.
 """
 
 [mentions."src/librustdoc/html/static"]