fix another lint issue

Author: Osseta

rb/lib/selenium/webdriver/common/options.rb

@@ -131,7 +131,7 @@ def w3c?(key)
 
       def process_w3c_options(options)
         w3c_options = options.select { |key, val| w3c?(key) && !val.nil? }
-        w3c_options[:unhandled_prompt_behavior] &&= 
+        w3c_options[:unhandled_prompt_behavior] &&=
           process_unhandled_prompt_behavior_value(w3c_options[:unhandled_prompt_behavior])
         options.delete_if { |key, _val| w3c?(key) }
         w3c_options