Add test, remove printlns

crates/ra_hir_expand/src/db.rs

@@ -206,7 +206,6 @@ fn macro_expand_with_arg(
     };
     let (tt, err) = macro_rules.0.expand(db, lazy_id, &macro_arg.0);
     // Set a hard limit for the expanded tt
-    eprintln!("expansion size: {}", tt.count());
     let count = tt.count();
     if count > 65536 {
         return (None, Some(format!("Total tokens count exceed limit : count = {}", count)));