Problem: Patch 9.1.1505 was not good
Solution: Revert "patch 9.1.1505: not possible to return completion type
for :ex command" and instead add the getcompletiontype()
function (Hirohito Higashi).
related: vim/vim#17606closes: vim/vim#1766296b3ef2389
Cherry-pick Test_multibyte_expression() from Vim, as it passes.
Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Co-authored-by: Shougo Matsushita <Shougo.Matsu@gmail.com>