[phone number format] Not all finnish phone number formats are covered

[aojarv]

Country/Region

FIN

Sample input with real phone format

+358500000, +3585000000

Reference docs/website

There are a few thousand "short numbers" issued in Finland in the 1990's and early 2000's that are still valid and not covered by this package.

Formats: 050 XXXX and 050 XXXXX (international formats +35850XXXX and +35850XXXXX)
NSN length: 6-7 (According to Wikipedia NSN length of a finnish phone number can be anything from 5 to 12)

Reference: https://en.wikipedia.org/wiki/Telephone_numbers_in_Finland (especially the "Short numbers" section)

Mobile phone number

• I confirmed that the provided sample is a mobile phone number.

[Bossa573]

While supporting such an old and low-usage phone number format is debatable, tentatively it was added to the package until unwanted behavior found