fixes for 3b

fixes for 3b

SCCS-vsn: usr.bin/ex/ex.h 7.2
SCCS-vsn: usr.bin/ex/ex_argv.h 7.2
SCCS-vsn: usr.bin/ex/ex_cmds.c 7.2
SCCS-vsn: usr.bin/ex/ex_extern.c 7.2
SCCS-vsn: usr.bin/ex/ex_re.h 7.2
SCCS-vsn: usr.bin/ex/ex_subr.c 7.2
SCCS-vsn: usr.bin/ex/ex_temp.c 7.2
SCCS-vsn: usr.bin/ex/ex_temp.h 7.2
SCCS-vsn: usr.bin/ex/ex_tty.h 7.2
SCCS-vsn: usr.bin/ex/ex_tune.h 7.2
SCCS-vsn: usr.bin/ex/ex_vars.h 7.2
SCCS-vsn: usr.bin/ex/ex_vis.h 7.2
SCCS-vsn: usr.bin/ex/ex_vops2.c 6.5
SCCS-vsn: usr.bin/ex/ex3.7preserve/ex3.7preserve.c 7.4
SCCS-vsn: usr.bin/ex/Makefile 7.3