Reformat using the new identifier sorting from rustfmt

compiler/rustc_builtin_macros/src/cmdline_attrs.rs

@@ -1,7 +1,7 @@
 //! Attributes injected into the crate root from command line using `-Z crate-attr`.
 
 use rustc_ast::attr::mk_attr;
-use rustc_ast::{self as ast, token, AttrItem, AttrStyle};
+use rustc_ast::{self as ast, AttrItem, AttrStyle, token};
 use rustc_parse::parser::ForceCollect;
 use rustc_parse::{new_parser_from_source_str, unwrap_or_emit_fatal};
 use rustc_session::parse::ParseSess;