Auto merge of #56737 - nnethercote:TokenStream-improvements, r=petrochenkov

`TokenStream` improvements

Some `TokenStream` improvements: shrinking `TokenStream` and some other types, and some other code clean-ups.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index c3497a17806..5820b49ab62 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -247,7 +247,7 @@ pub mod rt {
 
             let delim_span = DelimSpan::from_single(self.span);
             r.push(TokenTree::Delimited(
-                delim_span, token::Bracket, TokenStream::concat(inner).into()
+                delim_span, token::Bracket, TokenStream::new(inner).into()
             ));
             r
         }
diff --git a/src/libsyntax/ext/tt/transcribe.rs b/src/libsyntax/ext/tt/transcribe.rs
index a76779ffebd..a63abd40495 100644
--- a/src/libsyntax/ext/tt/transcribe.rs
+++ b/src/libsyntax/ext/tt/transcribe.rs
@@ -103,12 +103,12 @@ pub fn transcribe(cx: &ExtCtxt,
                 }
                 Frame::Delimited { forest, span, .. } => {
                     if result_stack.is_empty() {
-                        return TokenStream::concat(result);
+                        return TokenStream::new(result);
                     }
                     let tree = TokenTree::Delimited(
                         span,
                         forest.delim,
-                        TokenStream::concat(result).into(),
+                        TokenStream::new(result).into(),
                     );
                     result = result_stack.pop().unwrap();
                     result.push(tree.into());