Lots of small corrections by Andrew Kuchling (plus all new rotor docs)
diff --git a/Doc/lib/libfl.tex b/Doc/lib/libfl.tex
index b705a6b..5af1a04 100644
--- a/Doc/lib/libfl.tex
+++ b/Doc/lib/libfl.tex
@@ -78,11 +78,11 @@
It returns \code{1} if the user pressed YES, \code{0} if NO.
\end{funcdesc}
-\begin{funcdesc}{show_choice}{str1\, str2\, str3\, but1\, but2\, but3}
+\begin{funcdesc}{show_choice}{str1\, str2\, str3\, but1\optional{\, but2\,
+but3}}
Show a dialog box with a three-line message and up to three buttons.
It returns the number of the button clicked by the user
(\code{1}, \code{2} or \code{3}).
-The \var{but2} and \var{but3} arguments are optional.
\end{funcdesc}
\begin{funcdesc}{show_input}{prompt\, default}