https://git.ruby-lang.org/ruby.git/commit/?id=4f13927f1f

From 4f13927f1fe06a5fe23e25448d9adc80031e0bad Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Thu, 17 Oct 2019 19:42:25 +0900
Subject: [DOC] no change on Windows [Bug #15267] [ci skip]


diff --git a/NEWS b/NEWS
index e8fdfe0..aadb122 100644
--- a/NEWS
+++ b/NEWS
@@ -194,8 +194,8 @@ Fiber:: https://github.com/ruby/ruby/blob/trunk/NEWS#L194
 File::
   Modified method::
 
-    * File.extname now returns a dot string at a name ending with a
-      dot.  [Bug #15267]
+    * File.extname now returns a dot string at a name ending with a dot on
+      non-Windows platforms.  [Bug #15267]
 
           File.extname("foo.") #=> "."
 
diff --git a/file.c b/file.c
index d10aeaa..17881c0 100644
--- a/file.c
+++ b/file.c
@@ -4789,10 +4789,13 @@ ruby_enc_find_extname(const char *name, long *len, rb_encoding *enc) https://github.com/ruby/ruby/blob/trunk/file.c#L4789
  *  An empty string will also be returned when the period is the last character
  *  in +path+.
  *
+ *  On Windows, trailing dots are truncated.
+ *
  *     File.extname("test.rb")         #=> ".rb"
  *     File.extname("a/b/d/test.rb")   #=> ".rb"
  *     File.extname(".a/b/d/test.rb")  #=> ".rb"
- *     File.extname("foo.")            #=> "."
+ *     File.extname("foo.")            #=> "" on Windows
+ *     File.extname("foo.")            #=> "." on non-Windows
  *     File.extname("test")            #=> ""
  *     File.extname(".profile")        #=> ""
  *     File.extname(".profile.sh")     #=> ".sh"
-- 
cgit v0.10.2


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