https://git.ruby-lang.org/ruby.git/commit/?id=7de7d096e7

From 7de7d096e77ddcc6789ddea3e8aeecfaa684dccb Mon Sep 17 00:00:00 2001
From: romainsalles <romainsalles@u...>
Date: Fri, 23 Apr 2021 14:25:42 +0200
Subject: Fix wrong documentation

It doesn't return `nil` but raises an exception, as explained a few lines after
---
 hash.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/hash.c b/hash.c
index 1498f30..a363102 100644
--- a/hash.c
+++ b/hash.c
@@ -2120,7 +2120,6 @@ rb_hash_lookup(VALUE hash, VALUE key) https://github.com/ruby/ruby/blob/trunk/hash.c#L2120
  *  If +key+ is not found and no block was given,
  *  returns +default_value+:
  *    {}.fetch(:nosuch, :default) # => :default
- *    {}.fetch(:nosuch) # => nil
  *
  *  If +key+ is not found and a block was given,
  *  yields +key+ to the block and returns the block's return value:
-- 
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