https://git.ruby-lang.org/ruby.git/commit/?id=1b0f05168d

From 1b0f05168d802c92b1b5f870954cf503dad6e3b1 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 27 Mar 2022 11:24:06 +0900
Subject: [DOC] Fix references to unary operator

---
 string.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/string.c b/string.c
index f100f9d074..84a9d5f9ed 100644
--- a/string.c
+++ b/string.c
@@ -12266,10 +12266,10 @@ rb_enc_interned_str_cstr(const char *ptr, rb_encoding *enc) https://github.com/ruby/ruby/blob/trunk/string.c#L12266
  *
  *  === Methods for a Frozen/Unfrozen String
  *
- *  - #+string:: Returns a string that is not frozen: +self+, if not frozen;
- *               +self.dup+ otherwise.
- *  - #-string:: Returns a string that is frozen: +self+, if already frozen;
- *               +self.freeze+ otherwise.
+ *  - #+@:: Returns a string that is not frozen: +self+, if not frozen;
+ *          +self.dup+ otherwise.
+ *  - #-@:: Returns a string that is frozen: +self+, if already frozen;
+ *          +self.freeze+ otherwise.
  *  - #freeze:: Freezes +self+, if not already frozen; returns +self+.
  *
  *  === Methods for Querying
-- 
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