deactivate the if-modifier rule

[adler99]

For long lines it's easy to miss the condition at the very end of the line. It doesn't seem to be possible to define a max line length only for the if-modifier case. (see e.g. rubocop/rubocop#6149). So best action right now is to deactivate the rule and let the dev decide...

[barcoo-hb]

Just random though without knowing the exact best practices in ruby:
Another alternative might be to extract the condition-logic in a short helper method on the class

rubocop/ruby-style-guide#476

:-)