https://git.ruby-lang.org/ruby.git/commit/?id=28fad7764e

From 28fad7764e75c56209a55278a2f5522d118395f0 Mon Sep 17 00:00:00 2001
From: Masataka Pocke Kuwabara <kuwabara@p...>
Date: Sat, 15 Jan 2022 23:46:52 +0900
Subject: Tweak IO documentation for `IO.write('|cmd')` and so on [ci skip]

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

diff --git a/io.c b/io.c
index 39c4dcac48d..0973bd604fe 100644
--- a/io.c
+++ b/io.c
@@ -11161,7 +11161,7 @@ io_s_foreach(VALUE v) https://github.com/ruby/ruby/blob/trunk/io.c#L11161
  *
  *  If +name+ starts with a pipe character (<code>"|"</code>) and the receiver
  *  is the IO class, a subprocess is created in the same way as Kernel#open,
- *  and its output is returned.
+ *  and each line in its output is yielded.
  *  Consider to use File.foreach to disable the behavior of subprocess invocation.
  *
  *     File.foreach("testfile") {|x| print "GOT ", x }
@@ -11220,7 +11220,7 @@ io_s_readlines(VALUE v) https://github.com/ruby/ruby/blob/trunk/io.c#L11220
  *
  *  If +name+ starts with a pipe character (<code>"|"</code>) and the receiver
  *  is the IO class, a subprocess is created in the same way as Kernel#open,
- *  and its output is returned.
+ *  and each line in its output is yielded.
  *  Consider to use File.readlines to disable the behavior of subprocess invocation.
  *
  *     a = File.readlines("testfile")
@@ -11481,7 +11481,7 @@ io_s_write(int argc, VALUE *argv, VALUE klass, int binary) https://github.com/ruby/ruby/blob/trunk/io.c#L11481
  *
  *  If +name+ starts with a pipe character (<code>"|"</code>) and the receiver
  *  is the IO class, a subprocess is created in the same way as Kernel#open,
- *  and its output is returned.
+ *  and its output is printed to the standard output.
  *  Consider to use File.write to disable the behavior of subprocess invocation.
  *
  *    File.write("testfile", "0123456789", 20)  #=> 10
@@ -11539,7 +11539,7 @@ rb_io_s_write(int argc, VALUE *argv, VALUE io) https://github.com/ruby/ruby/blob/trunk/io.c#L11539
  *
  *  If +name+ starts with a pipe character (<code>"|"</code>) and the receiver
  *  is the IO class, a subprocess is created in the same way as Kernel#open,
- *  and its output is returned.
+ *  and its output is printed to the standard output.
  *  Consider to use File.binwrite to disable the behavior of subprocess invocation.
  *
  *  See also IO.read for details about +name+ and open_args.
-- 
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