-void bufcat_su(struct html *, const char *,
- const struct roffsu *);
-void buffmt_man(struct html *,
- const char *, const char *);
-void buffmt_includes(struct html *, const char *);
-void buffmt(struct html *, const char *, ...);
+void bufcat_fmt(struct html *, const char *, ...)
+ __attribute__((__format__ (printf, 2, 3)));