[rb] guards should match false not nil

Author: titusfortner

rb/lib/selenium/webdriver/support/guards.rb

@@ -37,9 +37,10 @@ def initialize(example, bug_tracker: '', conditions: nil)
           @messages = {}
         end
 
-        def add_condition(name, condition = nil, &block)
+        def add_condition(name, condition = false, &block)
+          condition = false if condition.nil?
           @guard_conditions << GuardCondition.new(name, condition, &block)
-          WebDriver.logger.info "Running with Guard '#{name}' set to: #{!!condition}"
+          WebDriver.logger.info "Running with Guard '#{name}' set to: #{condition}"
         end
 
         def add_message(name, message)