doubledollar-diff-1.0.1.tex

\documentclass{article}
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\begin{document}
A simple equation \DIFdelbegin %DIFDELCMD < \verb|\frac{2 a}{3 b}|
%DIFDELCMD < %%%
\begin{displaymath}\DIFdel{
\frac{2a}{3b}
}\end{displaymath}
%DIFAUXCMD
\DIFdelend \DIFaddbegin \verb|\frac{a}{b}|
\begin{displaymath}\DIFadd{
\frac{a}{b}
}\end{displaymath}
\DIFaddend A simple equation with additional space \DIFdelbegin %DIFDELCMD < \verb|\frac{2 a} {3 b}|
%DIFDELCMD < %%%
\DIFdelend \DIFaddbegin \verb|\frac{a} {b}|
\DIFaddend $$\DIFdelbegin \DIFdel{
\frac{2 a}{3 b}
}\DIFdelend \DIFaddbegin \DIFadd{
\frac{a}{b}
}\DIFaddend $$

\section [Section without space]{A \DIFaddbegin \DIFadd{new }\DIFaddend section title without space}

\section [Section with space] {A \DIFaddbegin \DIFadd{new }\DIFaddend section title with space}

\end{document}