[rubygems/rubygems] name is often a symbol, so only to_s once to avoid allocating it multiple times

https://github.com/rubygems/rubygems/commit/8eac49c429

lib/bundler/settings.rb

@@ -340,7 +340,8 @@ module Bundler
     end
 
     def is_bool(name)
-      BOOL_KEYS.include?(name.to_s) || BOOL_KEYS.include?(parent_setting_for(name.to_s))
+      name = name.to_s
+      BOOL_KEYS.include?(name) || BOOL_KEYS.include?(parent_setting_for(name))
     end
 
     def is_string(name)