making your programs hard to understand.
@item
-Calling a minor mode function from Lisp with a nil or omitted argument
+Calling a minor mode function from Lisp with a @code{nil} or omitted argument
does not enable the minor mode unconditionally; instead, it toggles
the minor mode---which is the straightforward thing to do, since that
is the behavior when invoked interactively. One downside is that it