Hi, I think there is a small typo in the documentation for the pic preprocessor (doc/pic.ms in the source tree). Compare figure 3-1 and the source code for the figure, which is printed after the figure.
Patch: --- groff-1.21/doc/pic.ms 2010-12-31 08:33:09.000000000 +0100 +++ groff-1.21/doc/pic.ms.fixed 2011-01-19 00:15:13.000000000 +0100 @@ -188,7 +188,7 @@ \&.PS ellipse "document"; arrow; -box width 0.6 "\efIpic\e/\efP(1)" +box width 0.6 "\efIgpic\e/\efP(1)" arrow; box width 1.1 "\efIgtbl\e/\efP(1) or \efIgeqn\e/\efP(1)" "(optional)" dashed; arrow; Best regards Ralph