to_s()
public
returns the domain name as a string.
The domain name doesn’t have a trailing dot even if the name object is
absolute.
Example:
p Resolv::DNS::Name.create("x.y.z.").to_s
p Resolv::DNS::Name.create("x.y.z").to_s
# File lib/resolv.rb, line 1197
def to_s
return @labels.join('.')
end