From 880a90cf2e56f9782b578fd48088c184bf3952ac Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@users.noreply.github.com>
Date: Fri, 13 Dec 2024 13:41:07 -0500
Subject: [PATCH] [DOC] [Feature #20205] Document the new power of String#+@

---
 string.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/string.c b/string.c
index 2f89e3c141..d7318c7916 100644
--- a/string.c
+++ b/string.c
@@ -3188,7 +3188,8 @@ rb_str_freeze(VALUE str)
  * call-seq:
  *   +string -> new_string or self
  *
- * Returns +self+ if +self+ is not frozen.
+ * Returns +self+ if +self+ is not frozen and can be mutated
+ * without warning issuance.
  *
  * Otherwise returns <tt>self.dup</tt>, which is not frozen.
  */