Use Node extensions instead of *splat

Author: bquorning

lib/rubocop/cop/rspec/around_block.rb

@@ -69,15 +69,13 @@ def add_no_arg_offense(node)
         end
 
         def check_for_unused_proxy(block, proxy)
-          name, = *proxy
-
           find_arg_usage(block) do |usage|
-            return if usage.include?(s(:lvar, name))
+            return if usage.include?(s(:lvar, proxy.name))
           end
 
           add_offense(
             proxy,
-            message: format(MSG_UNUSED_ARG, arg: name)
+            message: format(MSG_UNUSED_ARG, arg: proxy.name)
           )
         end
 

lib/rubocop/cop/rspec/single_argument_message_chain.rb

@@ -67,11 +67,10 @@ def single_element_array?(node)
         end
 
         def autocorrect_hash_arg(corrector, arg)
-          key, value = *arg.children.first
-
-          corrector.replace(arg, key_to_arg(key))
+          pair = arg.pairs.first
+          corrector.replace(arg, key_to_arg(pair.key))
           corrector.insert_after(arg.parent.loc.end,
-                                 ".and_return(#{value.source})")
+                                 ".and_return(#{pair.value.source})")
         end
 
         def autocorrect_array_arg(corrector, arg)