Random.phone sometimes generates an extra digit at the end of the phone number

[smoyte]

For example, see the following output:

irb(main):024:0> Random.phone => "235-306-5221" irb(main):025:0> Random.phone => "924-824-7990" irb(main):026:0> Random.phone => "396-991-3759" irb(main):027:0> Random.phone => "738-483-5420" irb(main):028:0> Random.phone => "735-520-8574" irb(main):029:0> Random.phone => "856-690-3655" irb(main):030:0> Random.phone => "480-373-1639" irb(main):031:0> Random.phone => "152-216-7767" irb(main):032:0> Random.phone => "278-245-7239" irb(main):033:0> Random.phone => "631-627-10576"