l3doc doesn't make "TF" grey when documenting internal conditionals

[joulev]

MWE

% \iffalse
%<*driver>
\documentclass{l3doc}
\begin{document}
\DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
% \begin{implementation}
%    \begin{macrocode}
%<@@=testpkg>
%<*package>
%    \end{macrocode}
% \begin{macro}[TF]{\@@_true:}
% This function is interesting.
%    \begin{macrocode}
\prg_new_conditional:Nnn \@@_true: { T, F, TF }
  { \prg_return_true: }
%    \end{macrocode}
% \end{macro}
%    \begin{macrocode}
%</package>
%    \end{macrocode}
% \end{implementation}

"TF" should be gray, shouldn't it?

[PhelypeOleinik]

The TF is typeset by \@@_typeset_TF:, which adds an explicit \color{black}. Indeed it would probably look better if it was grey too.

[muzimuzhi]

FYI, the \color{black} and \color{red} in \@@_typeset_TF: were both added in a87b887 (add documentation for "restricted expandable" functions, 2011-09-04).

latex3/l3kernel/l3doc.dtx

Lines 2124 to 2138 in 46c6191

	\cs_new_protected:Npn \@@_typeset_TF:
	{
	\cs_if_exist:NTF \Codedoc@explTF
	{ \hyperlink { explTF } }
	{ \mbox }
	{
	\color{black}
	\itshape TF
	\makebox[0pt][r]
	{
	\cs_if_exist:NT \Codedoc@explTF { \color{red} }
	\underline { \phantom{\itshape TF} \kern-0.1em }
	}
	}
	}