Use \programopt in one place.
diff --git a/Doc/doc/doc.tex b/Doc/doc/doc.tex
index 62fc11d..0426006 100644
--- a/Doc/doc/doc.tex
+++ b/Doc/doc/doc.tex
@@ -956,7 +956,8 @@
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