Unify mdoc_deroff() and man_deroff() into a common function deroff().

No functional change except that for mdoc(7), it now skips leading
escape sequences just like it already did for man(7).
Escape sequences rarely occur in mdoc(7) code and if they do,
skipping them is an improvement in this context.
Minus 30 lines of code.

1 files changed, 6 insertions, 0 deletions

diff --git a/roff.h b/roff.h
index cf29d6d1..750ccbe2 100644
--- a/roff.h
+++ b/roff.h
@@ -157,3 +157,9 @@ struct	roff_man {
 	enum roff_sec	  lastnamed; /* Last standard section seen. */
 	enum roff_next	  next;    /* Where to put the next node. */
 };
+
+__BEGIN_DECLS
+
+void		 deroff(char **, const struct roff_node *);
+
+__END_DECLS