插入的代码有多余的空白行

Question

我正在使用列表来格式化 xeLaTeX 中的代码块。当我将此图片插入 Anki 的卡中时，插入的代码有多余的空白行。以下是我的 MWE：

\documentclass[tikz]{standalone} 
\usepackage{tcolorbox,listings}
\usepackage{fontspec}
\setmonofont{Consolas}

\usepackage{color}
\usepackage{tikz}
\usepackage{framed}

\definecolor{background}{HTML}{EEEEEE}
\definecolor{comments}{HTML}{868686}
\definecolor{darkred}{RGB}{139,0,0}
\definecolor{darkblue}{RGB}{0,0,139}
\definecolor{chartreuse}{RGB}{127,255,0}
\definecolor{drakgreen}{RGB}{0,128,0}
\definecolor{lightgray}{RGB}{238,239,240}


\lstset{
language=[LaTeX]Tex,
keywordstyle=\color{darkblue},
texcsstyle=*\color{blue},
basicstyle=\normalfont\ttfamily,
commentstyle=\color{comments}\ttfamily,
stringstyle=\rmfamily,
frame=lrtb,
%numbers=left,
numbers=none,
numberstyle=\scriptsize,
numbersep=8pt,
showstringspaces=false,
breaklines=true,
frameround=ftff,
frame=none,
captionpos=t,
belowcaptionskip=0em,
belowskip=0em,
literate=
*{\{}{{\textcolor{darkred}{\{}}}{1}
{\}}{{\textcolor{darkred}{\}}}}{1}
{[}{{\textcolor{darkred}{[}}}{1}
{]}{{\textcolor{darkred}{]}}}{1},
}
\lstdefinestyle{mystyle}{
language=[LaTeX]Tex,
extendedchars=true, 
breaklines=true,
breakatwhitespace=true,
basicstyle=\ttfamily,
numbers=none,
keywordstyle=\color{darkblue},
keywordstyle=[2]\color{blue},
keywordstyle=[3]\color{darkblue},
keywordstyle=[4]\color{drakgreen},
alsoletter = {!},
keywords=[2]{definecolor,node,addplot},
keywords=[3]{usepackage},
keywords=[4]{begin,end,document,figure,figure*,axis}
}

\tcbuselibrary{listings,skins,breakable}
\newtcblisting{mycode}{
arc=0mm,
top=0mm,
bottom=0mm,
left=3mm,
right=0mm,
width=\textwidth,
boxrule=1pt,
colback=lightgray,
listing only,
%listing options={style=mystyle},
breakable
}

\begin{document}
\begin{mycode}
\begin{tikzpicture}
\filldraw [gray] (0,0) circle (2pt)
(1,1) circle (2pt)
(2,1) circle (2pt)
(2,0) circle (2pt);
\draw (0,0) .. controls (1,1) and (2,1) .. (2,0);
\end{tikzpicture}
\end{mycode}

When executed, that is, run via pdflatex or via latex followed by dvips, the resulting will contain something that looks like this:
\end{document}

如何消除顶部的多余空白行？

注释掉这一行'listing only'之后，绘制了这段代码的图。

Answer 1

尝试：

\newtcblisting{mycode}{
    arc=0mm,
    top=0mm,
    bottom=0mm,
    left=3mm,
    right=0mm,
    width=\textwidth,
    boxrule=1pt,
    colback=lightgray,
%   listing only,
    listing options={style=mystyle},
    breakable
}

选择listing only就是问题所在。