texmath-0.8: tests/writers/mfracZcomp-19.tex
\text{Inline\ double\ up\ arrows,\ auto,\ thick\ line~}\left. \Uparrow\frac{\sin\theta}{M}\Uparrow \right.\text{~the\ end.}
\text{Inline\ double\ up\ arrows,\ auto,\ thick\ line~}\left. \Uparrow\frac{\sin\theta}{M}\Uparrow \right.\text{~the\ end.}