% meta
\documentclass[10pt]{extarticle}

% packages
\usepackage[utf8]{inputenc}
\usepackage[margin=1.6in]{geometry}
\usepackage{hyperref}
\usepackage{amsmath}
\usepackage{amssymb}

% preamble commands
\linespread{1.0}
\usepackage{graphicx}
\graphicspath{{tests/assets/test_components/}}

% document details
\date{}

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\begin{document}
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\section{Section}

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vel metus sapien. Vivamus pharetra at metus nec semper. 

\subsection{Subsection}

Aliquam feugiat egestas libero luctus fermentum. 

\subsubsection{Subsubsection}

Sed rutrum sed ligula et interdum. Vestibulum sollicitudin pellentesque fermentum. 

\section{Unnumbered section}

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vel metus sapien. Vivamus pharetra at metus nec semper. 

\subsection{Unnumbered subsection}

Aliquam feugiat egestas libero luctus fermentum. 

\subsubsection{Unnumbered subsubsection}

Sed rutrum sed ligula et interdum. Vestibulum sollicitudin pellentesque fermentum. 

\section{No empty line section}

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vel metus sapien. Vivamus pharetra at metus nec semper. 

\subsection{No empty line subsection}

Aliquam feugiat egestas libero luctus fermentum. 

\subsubsection{No empty line subsubsection}

Sed rutrum sed ligula et interdum. Vestibulum sollicitudin pellentesque fermentum.

\section{No empty line unnumbered section}

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus vel metus sapien. Vivamus pharetra at metus nec semper. 

\subsection{No empty line unnumbered subsection}

Aliquam feugiat egestas libero luctus fermentum. 

\subsubsection{No empty line unnumbered subsubsection}

Sed rutrum sed ligula et interdum. Vestibulum sollicitudin pellentesque fermentum.

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\end{document}
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