https://bugs.gentoo.org/attachment.cgi?id=399898
Only first hunk preserved.
diff -ruN hp2xx-3.4.4-r0/doc/hp2xxinf.tex hp2xx-3.4.4-r3/doc/hp2xxinf.tex
--- hp2xx-3.4.4-r0/doc/hp2xxinf.tex	2003-06-21 17:41:16.000000000 +0200
+++ hp2xx-3.4.4-r3/doc/hp2xxinf.tex	2015-03-27 20:36:32.000000000 +0100
@@ -92,7 +92,7 @@
 @page
 @tex
 {\parskip=0pt
-\hfill mk\@daveg.com\par
+\hfill mk@@daveg.com\par
 \hfill {\it Using HP2XX}, \manvers\par
 \hfill \TeX{}info \texinfoversion\par
 }