Fixed File.extname at a name ending with a dot

File.extname now returns a dot string at a name ending with a dot.
[Bug #15267]

1 files changed, 8 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 84f9c1e2f1..e8fdfe0cf5 100644
--- a/NEWS
+++ b/NEWS
@@ -191,6 +191,14 @@ Fiber::
     * Added Fiber#raise that behaves like Fiber#resume but raises an
       exception on the resumed fiber.  [Feature #10344]
 
+File::
+  Modified method::
+
+    * File.extname now returns a dot string at a name ending with a
+      dot.  [Bug #15267]
+
+          File.extname("foo.") #=> "."
+
 FrozenError::
 
   New method::