to_s()
Instance Public methods
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 #=> "x.y.z"
p Resolv::DNS::Name.create("x.y.z").to_s #=> "x.y.z"
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