any_to_s(obj)
private
Coerce an object to a string, providing our own representation if to_s is
not defined for the object.
# File lib/drb/drb.rb, line 1528
def any_to_s(obj)
obj.to_s + ":#{obj.class}"
rescue
sprintf("#<%s:0x%lx>", obj.class, obj.__id__)
end