Jan 13, 2026 · Jan 13, 2026 · Jan 13, 2026 · Jan 13, 2026 · Jan 14, 2026
diff --git a/Doc/library/cmd.rst b/Doc/library/cmd.rst
   are the beginning and ending indexes of the prefix text, which could be used to
   provide different completion depending upon which position the argument is in.

 .. rubric:: Empty input behavior

 When the user enters an empty line in response to the prompt, ``Cmd`` does
 **not** ignore the input by default. Instead, it repeats the last non-empty
 command entered.

 This behavior is implemented by :meth:`Cmd.emptyline`. Subclasses that do not
 want empty input to repeat the previous command  should override
 :meth:`Cmd.emptyline` to do nothing::

   def emptyline(self):
       pass

 .. method:: Cmd.do_help(arg)

   Method called on an input line when the command prefix is not recognized. If
   this method is not overridden, it prints an error message and returns.

   Note that if :meth:`emptyline` is not overridden, empty input will cause
   the previous command to be repeated and passed again to this method.

 .. method:: Cmd.completedefault(text, line, begidx, endidx)

diff --git a/Misc/NEWS.d/next/Documentation/2026-01-14-00-09-43.gh-issue-143804.KHeDcP.rst b/Misc/NEWS.d/next/Documentation/2026-01-14-00-09-43.gh-issue-143804.KHeDcP.rst
 Clarified the documentation of :mod:`cmd` regarding the default handling of
 empty input lines.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -93,6 +93,18 @@ A :class:`Cmd` instance has the following methods:
		are the beginning and ending indexes of the prefix text, which could be used to
		provide different completion depending upon which position the argument is in.

		.. rubric:: Empty input behavior

		When the user enters an empty line in response to the prompt, ``Cmd`` does
		not ignore the input by default. Instead, it repeats the last non-empty
		command entered.

		This behavior is implemented by :meth:`Cmd.emptyline`. Subclasses that do not
		want empty input to repeat the previous command should override
		:meth:`Cmd.emptyline` to do nothing::

		def emptyline(self):
		pass

		.. method:: Cmd.do_help(arg)

Expand DownExpand Up		@@ -127,6 +139,8 @@ A :class:`Cmd` instance has the following methods:
		Method called on an input line when the command prefix is not recognized. If
		this method is not overridden, it prints an error message and returns.

		Note that if :meth:`emptyline` is not overridden, empty input will cause
		the previous command to be repeated and passed again to this method.

		.. method:: Cmd.completedefault(text, line, begidx, endidx)

Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Clarified the documentation of :mod:`cmd` regarding the default handling of
		empty input lines.