texmath-0.13.2: test/writer/starmath/061_phantom_alignment.test

<<< tex
\begin{gathered}
x + y = 2x + y - x \\
\phantom{x+y} = 3x + y - 2x
\end{gathered}
>>> starmath
matrix { x + y = 2x + y - x ## phantom {x + y} = 3x + y - 2x }