test_inadvertent_creation.rb: fix assertion name

* test/-ext-/symbol/test_inadvertent_creation.rb: fix assertion name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_method.c: preserve encoding

* vm_method.c (rb_attr): preserve encoding of the attribute ID in
  error message.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e