Pin rdoc to < 6.4
rdoc 6.4 pulls in psych 4 and Puppet is incompatible with that. Wedon't want to list psych since that updates the bundled version
Pin rdoc to < 6.4
rdoc 6.4 pulls in psych 4 and Puppet is incompatible with that. We
don't want to list psych since that updates the bundled version