standardize keyword lines

standardize keyword lines

SCCS-vsn: old/awk/b.c 4.2
SCCS-vsn: old/awk/freeze.c 4.2
SCCS-vsn: old/awk/lib.c 4.3
SCCS-vsn: old/awk/main.c 4.2
SCCS-vsn: old/awk/parse.c 4.2
SCCS-vsn: old/awk/proc.c 4.3
SCCS-vsn: old/awk/run.c 4.4
SCCS-vsn: old/awk/token.c 4.2
SCCS-vsn: old/awk/tran.c 4.3