Use \programopt in one place.

Doc/doc/doc.tex

@@ -956,7 +956,8 @@ distribution, to create or maintain whole documents or sections.
 	symbolic link to it or run it in place; the actual script file 
 	must be stored as part of the documentation source tree,
 	though it may be used to format documents outside the
-	tree.  Use \program{mkhowto -}\program{-help} for a list of
+	tree.  Use \program{mkhowto} \programopt{-}\programopt{-help}
+        for a list of
         command line options.
 
         \program{mkhowto} can be used for both \code{howto} and

Doc/lib/libshutil.tex

@@ -44,7 +44,7 @@ file type and creator codes will not be correct.
 \begin{funcdesc}{copy2}{src, dst}
   Similar to \function{copy()}, but last access time and last
   modification time are copied as well.  This is similar to the
-  \UNIX{} command \program{cp -p}.
+  \UNIX{} command \program{cp} \programopt{-p}.
 \end{funcdesc}
 
 \begin{funcdesc}{copytree}{src, dst\optional{, symlinks}}