patch 8.2.1447: Vim9: return type of keys() is list<any> Commit: https://github.com/vim/vim/commit/32f335f75c5860baa452144f63ab7a4a3dd83134 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Aug 14 18:56:45 2020 +0200 patch 8.2.1447: Vim9: return type of keys() is list<any> Problem: Vim9: return type of keys() is list<any>. Solution: Should be list<string>. (closes https://github.com/vim/vim/issues/6711)