https://git.ruby-lang.org/ruby.git/commit/?id=c53667691a

From c53667691a52bcaea4314974201c53dfc282cd95 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 18 Aug 2022 23:25:05 +0900
Subject: [DOC] `offset` argument of Regexp#match

---
 re.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/re.c b/re.c
index a633d1bb7b..5091f9a124 100644
--- a/re.c
+++ b/re.c
@@ -3499,13 +3499,18 @@ rb_reg_match2(VALUE re) https://github.com/ruby/ruby/blob/trunk/re.c#L3499
  *
  *  With no block given, returns the MatchData object
  *  that describes the match, if any, or +nil+ if none;
- *  the search begins at the given byte +offset+ in +self+:
+ *  the search begins at the given character +offset+ in +string+:
  *
  *    /abra/.match('abracadabra')      # => #<MatchData "abra">
  *    /abra/.match('abracadabra', 4)   # => #<MatchData "abra">
  *    /abra/.match('abracadabra', 8)   # => nil
  *    /abra/.match('abracadabra', 800) # => nil
  *
+ *    string = "\u{5d0 5d1 5e8 5d0}cadabra"
+ *    /abra/.match(string, 7)          #=> #<MatchData "abra">
+ *    /abra/.match(string, 8)          #=> nil
+ *    /abra/.match(string.b, 8)        #=> #<MatchData "abra">
+ *
  *  With a block given, calls the block if and only if a match is found;
  *  returns the block's value:
  *
-- 
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