Less technical documentation

base/doc/ltnews33.tex

@@ -151,11 +151,13 @@ \subsection{Add a Lua callback to ltshipout to provide a uniform location for ap
 
 \subsection{Improved copy\&paste support for \pdfTeX{} documents}
 
-Copying from and searching in PDF files works more reliably, if these
-files contain ToUnicode CMaps which help the viewer to map glyphs to
-(Unicode) characters. These CMaps already were written for OpenType
-font in \XeTeX{} and \LuaTeX{}. Now \pdfTeX's support for generating
-these maps is enabled by default too.
+When compiling with \pdfTeX{}, additional information is added to the
+PDF file to improve copying from and searching in text. This especially
+allows ligatures to copy correctly from \pdfTeX{} generated PDF files in
+most cases.
+
+Since this has been integrated into the kernel, most documents should no
+longer need to load the \pkg{cmap} package or input \texttt{glyphtounicode}.
 %
 \githubissue{465}