Move cfg is in expermental posistion and update fmt str.

Author: Keith-Cancel

src/tools/rust-analyzer/crates/proc-macro-srv/src/token_stream.rs

@@ -581,6 +581,7 @@ fn debug_token_tree<S: fmt::Debug>(
     write!(f, "{:indent$}", "", indent = depth * 2)?;
     match tt {
         TokenTree::Group(Group { delimiter, stream, span }) => {
+            #[cfg(bootstrap)]
             writeln!(
                 f,
                 "GROUP {}{} {:#?} {:#?} {:#?}",
@@ -598,9 +599,27 @@ fn debug_token_tree<S: fmt::Debug>(
                 },
                 span.open,
                 span.close,
-                #[cfg(bootstrap)]
                 span.entire,
             )?;
+            #[cfg(not(bootstrap))]
+            writeln!(
+                f,
+                "GROUP {}{} {:#?} {:#?}",
+                match delimiter {
+                    proc_macro::Delimiter::Parenthesis => "(",
+                    proc_macro::Delimiter::Brace => "{",
+                    proc_macro::Delimiter::Bracket => "[",
+                    proc_macro::Delimiter::None => "$",
+                },
+                match delimiter {
+                    proc_macro::Delimiter::Parenthesis => ")",
+                    proc_macro::Delimiter::Brace => "}",
+                    proc_macro::Delimiter::Bracket => "]",
+                    proc_macro::Delimiter::None => "$",
+                },
+                span.open,
+                span.close,
+            )?;
             if let Some(stream) = stream {
                 debug_token_stream(stream, depth + 1, f)?;
             }