G:\Z-Test>xelatex test-utf8
This is XeTeX, Version 3.14159265-2.6-0.99999 (TeX Live 2018/W32TeX) (preloaded format=xelatex)
restricted \write18 enabled.
entering extended mode
(./test-utf8.tex
LaTeX2e <2018-04-01> patch level 5
(d:/texlive/2018/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(d:/texlive/2018/texmf-dist/tex/latex/base/size10.clo))
> \expanded=\expanded.
l.40 \show\expanded
?