LATTEST(contains(fmt, from_ascii("%1$s")));
LATTEST(contains(fmt, from_ascii("%2$s")));
docstring str = subst(fmt, from_ascii("%1$s"), from_ascii(arg1));
- str = subst(fmt, from_ascii("%2$s"), arg2);
+ str = subst(str, from_ascii("%2$s"), arg2);
return subst(str, from_ascii("%%"), from_ascii("%"));
}