Move token extra-traits helpers to tt module
diff --git a/src/ty.rs b/src/ty.rs
index 9d2fa01..f7b9011 100644
--- a/src/ty.rs
+++ b/src/ty.rs
@@ -4,7 +4,7 @@
 #[cfg(feature = "extra-traits")]
 use std::hash::{Hash, Hasher};
 #[cfg(feature = "extra-traits")]
-use mac::TokenStreamHelper;
+use tt::TokenStreamHelper;
 
 ast_enum_of_structs! {
     /// The different kinds of types recognized by the compiler