* bignum.c (Init_Bignum): [DOC] Bignum::GMP_VERSION.

* complex.c (Init_Complex): [DOC] ignore an internal class.

* dir.c (Init_Dir): [DOC] File::FNM_SYSCASE.

* file.c (rb_file_exists_p): [DOC] File.exists? is deprecated.

* object.c (rb_mod_initialize_clone): [DOC] ignore implementation
  detail.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46990 b2dd03c8-39d4-4d8f-98ff-823fe69b080e