How to comment out a line in docstrip?

Question

While using docstrip to write a documented package, I have difficulties in commenting lines of the doc. Here is my minimal test.dtx

% \iffalse
%<*driver>
\documentclass{l3doc}
\begin{document}
  \DocInput{test.dtx}
\end{document}
%</driver>
% \fi
% ABC % DEF

I would like the final DEF to be commented out.

Answer 1

Inside \DocInput the comment character is ^^A:

% \iffalse
%<*driver>
\documentclass{l3doc}
\begin{document}
  \DocInput{test.dtx}
\end{document}
%</driver>
% \fi
% ABC ^^A DEF