Spacing with Font Roboto

[Herbert Voss]

Am 09.12.19 um 17:20 schrieb Uwe Siart:
> Alexander Krumeich <alexander.krumeich at gmail.com> writes:
>
>> \documentclass[a4paper]{scrartcl}
>> \usepackage{fontspec}
>> \setmainfont{roboto}
>>
>> \begin{document}
>> This is a test.
>> \end{document}
>>
>> Following is a verbatim copy of the characters when I mark and copy
>> them from my PDF viewer:
>>
>> T h is
>> is
>> a
>> te s t.
> >From the PDF produced by lualatex I get
>
> T h i s i s a t e s t .
>
> Interestingly, with xelatex I get
>
> This is a test.
>
> (as it should be)

I cannot see it. Both are correct. The only difference is that I have a 
case sensitive
file system, the reason why I have to use

\setmainfont{Roboto}

I am working with macOS with TL from Tug (not MacTeX)

Herbert