vimtex/test/feature/indentation/main.tex

\documentclass{minimal}
\usepackage{amsmath}
\usepackage{tikz}
\begin{document}

\tikz \fill[green] rectangle (0.5,0.5); Something
about something.

\begin{align}
  2+2=4
\end{align}

\begin{itemize}
  \item item is indented twice
    and the next line is indented to match
\end{itemize}

\end{document}