From 9e0cbcf2b83f0386e263ae87aa4d5315f2f349b7 Mon Sep 17 00:00:00 2001
From: Rholais Lii <rholais@gmail.com>
Date: Sun, 19 Apr 2020 20:47:11 +0800
Subject: [PATCH] Show short caption as an option

the short caption is as an option instead of an argument
---
 sample-book.tex | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sample-book.tex b/sample-book.tex
index 6f168f3..d47c11b 100644
--- a/sample-book.tex
+++ b/sample-book.tex
@@ -582,7 +582,7 @@ \section{Figures and Tables}\label{sec:figures-and-tables}
 
 \begin{marginfigure}%
   \includegraphics[width=\linewidth]{helix}
-  \caption{This is a margin figure.  The helix is defined by 
+  \caption{This is a margin figure.  The helix is defined by
     $x = \cos(2\pi z)$, $y = \sin(2\pi z)$, and $z = [0, 2.7]$.  The figure was
     drawn using Asymptote (\url{http://asymptote.sf.net/}).}
   \label{fig:marginfig}
@@ -632,9 +632,9 @@ \section{Figures and Tables}\label{sec:figures-and-tables}
 You may specify the caption in any one of the following forms:
 \begin{docspec}
   \doccmd{caption}\{\docarg{long caption}\}\\
-  \doccmd{caption}[\docarg{short caption}]\{\docarg{long caption}\}\\
+  \doccmd{caption}[\docopt{short caption}]\{\docarg{long caption}\}\\
   \doccmd{caption}[][\docopt{offset}]\{\docarg{long caption}\}\\
-  \doccmd{caption}[\docarg{short caption}][\docopt{offset}]%
+  \doccmd{caption}[\docopt{short caption}][\docopt{offset}]%
                   \{\docarg{long caption}\}
 \end{docspec}
 A positive \docopt{offset} will push the caption down the page. The short