We have to similar rules
RBGuardClauseRule and RBGuardingClauseRule
One is a ParseTreeLintRule, the other one is a TransformationRule.
I don't know why we have to at all.
One rule was "disabled" (or not chown) in the CriticsBrowser because it
was removed from the set of all rules before opening CriticsBrowser
(see method #allGoodRules).
In the past, monty fixed the class comment and #rational for class
RBGuardClauseRule to correctly explain what this rule is about.
This of course now differes from the similar rule RBGuardingClauseRule.