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Surprisingly, every escape sequence can also be used as an argument
delimiter for an outer escape sequence, in which case the delimiting
escape sequence retains its syntax but usually ignores its argument
and loses its inherent effect.  Add rudimentary support for this
syntax quirk in order to improve parsing compatibility with groff.

# $OpenBSD: Makefile,v 1.23 2022/06/08 13:08:00 schwarze Exp $

REGRESS_TARGETS	 = one two multi comment
REGRESS_TARGETS	+= A1 B bs_man bs_mdoc c c_man E1 e f h hneg
REGRESS_TARGETS	+= l O1 o p r V1 w z
REGRESS_TARGETS	+= ignore invalid unsupp
HTML_TARGETS	 = f
LINT_TARGETS	 = comment A1 B h l O1 o r V1 w ignore invalid unsupp

# mandoc defects:
# - \h with a negative argument replaces output characters
#   instead of overstriking them
# - \r does not return to the previous output line

SKIP_GROFF	 = hneg r

# intentional difference:
# - mandoc does not inspect the environment

SKIP_GROFF	+= V1

.include <bsd.regress.mk>