fix long option markup

Doc/whatsnew/whatsnew25.tex

@@ -46,8 +46,8 @@ Before a package can be uploaded, you must be able to build a
 distribution using the \command{sdist} Distutils command.  Once that
 works, you can run \code{python setup.py upload} to add your package
 to the PyPI archive.  Optionally you can GPG-sign the package by
-supplying the \programopt{--sign} and
-\programopt{--identity} options.
+supplying the \longprogramopt{sign} and
+\longprogramopt{identity} options.
 
 \begin{seealso}