Reports case statements without else blocks. An else block should always be present to specify the default result if no match is found.

Example:

# Bad practice
case status
when :active
  perform_action
end

A quick-fix is available to insert an else block. After the quick-fix is applied, the result looks like this:

# Good practice
case status
when :active
  perform_action
else
  # type code here
end

Inspired by 'Roodi'