/usr/src/gnu/usr.bin/groff/doc/../../../../contrib/groff/doc/groff.texinfo:2724: Unknown command `slanted'.
/usr/src/gnu/usr.bin/groff/doc/../../../../contrib/groff/doc/groff.texinfo:2724: Misplaced {.
/usr/src/gnu/usr.bin/groff/doc/../../../../contrib/groff/doc/groff.texinfo:2724: Misplaced }.
/usr/src/gnu/usr.bin/groff/doc/../../../../contrib/groff/doc/groff.texinfo:2724: Unknown command `slanted'.
< Repeats a few times >
Too many errors!  Gave up.
< Repeats a lot of times >
Stop in /usr/src/gnu/usr.bin/groff/doc.
*** Error code 1

Stop in /usr/src/gnu/usr.bin/groff.
*** Error code 1

Stop in /usr/src/gnu/usr.bin.
*** Error code 1

Stop in /usr/src/gnu.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.
many errors!  Gave up.