From 85f01794795521e29e64e06ead416cbd3d52c55c Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Thu, 24 Dec 2020 17:14:48 +0900
Subject: [PATCH] doc/keywords.rdoc: mention pattern matching in the `in`
 keyword section

---
 doc/keywords.rdoc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/doc/keywords.rdoc b/doc/keywords.rdoc
index a74126823d..bfd0bec8da 100644
--- a/doc/keywords.rdoc
+++ b/doc/keywords.rdoc
@@ -82,6 +82,8 @@ if::
 in::
   Used to separate the iterable object and iterator variable in a +for+ loop.
   See {control expressions}[rdoc-ref:syntax/control_expressions.rdoc]
+  It also serves as a pattern in a +case+ expression. See
+  See {pattern matching}[rdoc-ref:syntax/pattern_matching.rdoc]
 
 module::
   Creates or opens a module.  See {modules and classes