my $today = days_ago(0);
my $yesterday = days_ago(1);
-# We don't know the exact file name, because the extention depends on the
+# We don't know the exact file name, because the extension depends on the
# underlying dbm library, which could be anything. We can't glob, because
# perl < 5.6 considers if (<*>) { ... } to be tainted
# Instead, just check the return value for today's data and yesterday's,