Incorrect validator warning: attraction=log_flume

[nc011]

Describe the bug
When mapping a log flume as an "unclosed" way, the validator throws a warning.

"Log flume should be a closed area based on the tag attraction=log_flume"

To Reproduce

1. Draw a way (line) - do not "close" the line (i.e. do not connect end-to-end).
2. Tag as attraction=log_flume

Expected behavior
No warning should be thrown by the validator. As noted in the documentation, most mappers map log flumes as a linear way.

A log flume. You sit in a boat that is moved by the flow of water. Some log flume attractions feature a rapid descent and splashdown. These are often mapped as a linear way following the route of the ride.

There is no requirement for this to be a closed linear way. The boats can go up and down the same track. For example, in this instance the log flume is pulled back up the ramp via a pulley system.

Additional context
Adding the tag area=no prevents the validator warning.