use TokenStream rather than &[TokenTree] for built-in macros

That way, we don't loose the jointness info

1 files changed, 1 insertions, 5 deletions

diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index bead941b20d..37305055e62 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -356,11 +356,7 @@ pub fn tt_to_string(tt: tokenstream::TokenTree) -> String {
     to_string(|s| s.print_tt(tt, false))
 }
 
-pub fn tts_to_string(tts: &[tokenstream::TokenTree]) -> String {
-    tokens_to_string(tts.iter().cloned().collect())
-}
-
-pub fn tokens_to_string(tokens: TokenStream) -> String {
+pub fn tts_to_string(tokens: TokenStream) -> String {
     to_string(|s| s.print_tts(tokens, false))
 }