我有以下代码来制作长表：
\documentclass{article}
%% Language and font encodings
\usepackage[english]{babel}
\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
%% Sets page size and margins
\usepackage[a4paper,top=2.5cm,bottom=2.5cm,left=3cm,right=3cm,marginparwidth=1.75cm]{geometry}
%% Useful packages
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{longtable}
\usepackage{array}
\usepackage{setspace}
%%%endfloat stuff
\usepackage[nomarkers, nofiglist, notablist]{endfloat}
\AtBeginDelayedFloats{\renewcommand{\baselinestretch}{1.5}} %linespacing in captions
\DeclareDelayedFloatFlavor{sidewaysfigure}{figure} %to have right numbering when using endfloat
\DeclareDelayedFloatFlavor{sidewaystable}{table}
\DeclareDelayedFloatFlavor{longtable}{table}
%https://tex.stackexchange.com/questions/297717/sidewaysfigure-wrong-numbering
\begin{document}
\LTcapwidth=\textwidth
{\setlength\tabcolsep{4pt}\small
\begin{longtable}{p{4cm}|p{5cm}|c|c}
\toprule%\hline\hline
\textbf{Measure} & \textbf{Meaning} & \textbf{Correlation} & \textbf{References}\\ \hline
\endfirsthead
\multicolumn{4}{r}{\ldots continued}\\ \hline
\textbf{Measure} & \textbf{Meaning} & \textbf{Correlation} & \textbf{References}\\ \hline
\endhead % all the lines above this will be repeated on every page
\hline
\multicolumn{4}{r}{continued \ldots}\\
\endfoot
\caption{caaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\newline\hspace{\textwidth}
ptioooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooon}
\endlastfoot
Heterogeneity in-degree distribution & Degree distribution (in- and out-degree distribution for directed networks) is the frequency distribution of node degree across all nodes, and is a descriptor of the heterogeneity of the network. A network is considered highly homogeneous when nodes are all of very similar degree, and highly heterogeneous when there is high variability in the number of links per node. & $+$ & reference \\
\hline\hline
\newpage
Heterogeneity in-degree distribution & Degree distribution (in- and out-degree distribution for directed networks) is the frequency distribution of node degree across all nodes, and is a descriptor of the heterogeneity of the network. A network is considered highly homogeneous when nodes are all of very similar degree, and highly heterogeneous when there is high variability in the number of links per node. & $+$ & reference \\
\hline\bottomrule
\label{table:measures}
\end{longtable}
}
\end{document}
有人能向我解释一下为什么输出中会出现这一行吗？
