Fix alphabetization of imports in libsyntax/ext/format.rs

Author: rprichard

src/libsyntax/ext/format.rs

@@ -16,8 +16,8 @@ use codemap::{Span, respan};
 use ext::base::*;
 use ext::base;
 use ext::build::AstBuilder;
-use fold::Folder;
 use fmt_macros as parse;
+use fold::Folder;
 use parse::token::special_idents;
 use parse::token;
 use ptr::P;