Extension key registration - rules for underscores not applied

What was the cause of the issue?

Register extension key

An extension key must have minimum 3, maximum 30 characters (not counting underscores).

This rules implies, that any number of underscores is allowed.

However the form actually does count underscores.

Steps to reproduce

Registering test_______________________test (31 characters) is not possible (but should), registering test______________________test (30 characters) is possible. Registering aa is not possible, registering a_a is possible (but should'nt).

long

short

Possible solution

• Either remove the “(not counting underscores)” rule
• …or fix the validation to follow the given rule