--- a/libinterp/parse-tree/oct-parse.yy	Fri Feb 02 17:15:09 2024 +0100
+++ b/libinterp/parse-tree/oct-parse.yy	Fri Feb 02 11:36:50 2024 -0800
@@ -6315,7 +6315,7 @@
 
 DEFMETHOD (feval, interp, args, nargout,
            doc: /* -*- texinfo -*-
-@deftypefn {} {} feval (@var{name}, @dots{})
+@deftypefn {} {@var{retval} =} feval (@var{name}, @dots{})
 Evaluate the function named @var{name}.
 
 Any arguments after the first are passed as inputs to the named function.

--- a/scripts/help/which.m	Fri Feb 02 17:15:09 2024 +0100
+++ b/scripts/help/which.m	Fri Feb 02 11:36:50 2024 -0800
@@ -24,7 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn {} {} which name @dots{}
+## @deftypefn  {} {} which @var{name} @dots{}
+## @deftypefnx {} {[@var{str}, @dots{}] =} which ('@var{name}', @dots{})
 ## Display the type of each @var{name}.
 ##
 ## If @var{name} is defined from a function file, the full name of the file is

--- a/scripts/signal/ifftshift.m	Fri Feb 02 17:15:09 2024 +0100
+++ b/scripts/signal/ifftshift.m	Fri Feb 02 11:36:50 2024 -0800
@@ -24,8 +24,8 @@
 ########################################################################
 
 ## -*- texinfo -*-
-## @deftypefn  {} {@var{y} =} ifftshift (@var{x})
-## @deftypefnx {} {@var{y} =} ifftshift (@var{x}, @var{dim})
+## @deftypefn  {} {@var{x} =} ifftshift (@var{y})
+## @deftypefnx {} {@var{x} =} ifftshift (@var{y}, @var{dim})
 ## Undo the action of the @code{fftshift} function.
 ##
 ## For even length @var{x}, @code{fftshift} is its own inverse, but odd lengths