skosify.check.preflabel_uniqueness: Unknown preflabel-policy 'all'

[tombaker]

According to the skosify.check.preflabel_uniqueness docstring, the method supports four values for the "policy" parameter:

• 'shortest' (keep the shortest label),
• 'longest' (keep the longest label),
• 'uppercase' (prefer uppercase),
• 'lowercase' (prefer uppercase) or
• 'all' (keep all, just log the problems)

I have created a gist which shows:

• preflabel_uniqueness(n, policy='longest') works as expected
• preflabel_uniqueness(n, policy='all') gets an error message: CRITICAL:root:Unknown preflabel-policy: all

[tombaker]

Note that

'lowercase' (prefer uppercase)

should probably read

'lowercase' (prefer lowercase)