Make use of \longprogramopt where appropriate.
diff --git a/Doc/lib/libsys.tex b/Doc/lib/libsys.tex
index af2d21f..a92201c 100644
--- a/Doc/lib/libsys.tex
+++ b/Doc/lib/libsys.tex
@@ -89,7 +89,7 @@
A string giving the site-specific directory prefix where the
platform-dependent Python files are installed; by default, this is
also \code{'/usr/local'}. This can be set at build time with the
-\programopt{-}\programopt{-exec-prefix} argument to the
+\longprogramopt{exec-prefix} argument to the
\program{configure} script. Specifically, all configuration files
(e.g. the \file{config.h} header file) are installed in the directory
\code{exec_prefix + '/lib/python\var{version}/config'}, and shared
@@ -199,7 +199,7 @@
A string giving the site-specific directory prefix where the platform
independent Python files are installed; by default, this is the string
\code{'/usr/local'}. This can be set at build time with the
-\programopt{-}\programopt{-prefix} argument to the
+\longprogramopt{prefix} argument to the
\program{configure} script. The main collection of Python library
modules is installed in the directory \code{prefix +
'/lib/python\var{version}'} while the platform independent header