Hi there..
FWIW .. in the Debian (stable) package, there is
/usr/lib/ruby/vendor_ruby/coquelicot/num.rb
which has lines 45 and 46:
Fixnum.send(:include, Coquelicot::Num)
Bignum.send(:include, Coquelicot::Num)
if these are changed:
Integer.send(:include, Coquelicot::Num)
Integer.send(:include, Coquelicot::Num)
This will prervent the cron.d/coquelicot garbage collection from sending
warning messages every 15 minutes.