Auto merge of #72262 - Dylan-DPC:rollup-x56q1jj, r=Dylan-DPC

Rollup of 7 pull requests

Successful merges:

 - #71625 (Improve the documentation for ManuallyDrop to resolve conflicting usage of terminology)
 - #71919 (Update transitive dependency to work towards removing syn <1.0 dep)
 - #72166 (Simpler slice `Iterator` methods)
 - #72216 (Remove `lang_items\(\).*\.unwrap\(\)`)
 - #72230 (Updated documentation of Prefix::VerbatimDisk)
 - #72234 (Implement Default for proc_macro::TokenStream)
 - #72258 (Fix typo Arbintrary to Arbitrary)

Failed merges:

r? @ghost

1 files changed, 7 insertions, 0 deletions

diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs
index 31bc61263ab..b6544341fa9 100644
--- a/src/libproc_macro/lib.rs
+++ b/src/libproc_macro/lib.rs
@@ -158,6 +158,13 @@ impl fmt::Debug for TokenStream {
     }
 }
 
+#[stable(feature = "proc_macro_token_stream_default", since = "1.45.0")]
+impl Default for TokenStream {
+    fn default() -> Self {
+        TokenStream::new()
+    }
+}
+
 #[unstable(feature = "proc_macro_quote", issue = "54722")]
 pub use quote::{quote, quote_span};