dotfiles/dot_vim/plugged/vimtex/test/test-indentation/test_ampersands-off_input.tex

\begin{equation}
    \begin{aligned}
        1 &
        & 2 \\
        3 &
        & 4 \\
    \end{aligned}
\end{equation}

\begin{align}
  &x(
y)
\end{align}