https://git.ruby-lang.org/ruby.git/commit/?id=ca8daf70fa

From ca8daf70fa7045aa1e505514497d1ac4720a6b16 Mon Sep 17 00:00:00 2001
From: Alan Wu <XrXr@u...>
Date: Wed, 3 Aug 2022 10:48:43 -0400
Subject: [DOC] Mention Windows text mode EOF marker interpretation

I don't think this is super well known so it's worth mentioning as it
can be a pitfall.

See: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/fopen-wfopen?view=msvc-170

Co-authored-by: Nobuyoshi Nakada <nobu@r...>
---
 io.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/io.c b/io.c
index c91899a6fe..f2c64989df 100644
--- a/io.c
+++ b/io.c
@@ -14504,9 +14504,11 @@ set_LAST_READ_LINE(VALUE val, ID _x, VALUE *_y) https://github.com/ruby/ruby/blob/trunk/io.c#L14504
  *  Either of the following may be suffixed to any of the string read/write modes above:
  *
  *  - <tt>'t'</tt>: Text data; sets the default external encoding to +Encoding::UTF_8+;
- *    on Windows, enables conversion between EOL and CRLF.
+ *    on Windows, enables conversion between EOL and CRLF and enables interpreting +0x1A+
+ *    as an end-of-file marker.
  *  - <tt>'b'</tt>: Binary data; sets the default external encoding to +Encoding::ASCII_8BIT+;
- *    on Windows, suppresses conversion between EOL and CRLF.
+ *    on Windows, suppresses conversion between EOL and CRLF and disables interpreting +0x1A+
+ *    as an end-of-file marker.
  *
  *  If neither is given, the stream defaults to text data.
  *
-- 
cgit v1.2.1


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