Those look like ANSI color escape codes. I’m not sure why this would have changed, and I thought PowerShell now supported these, but you should be able to pass —color=never to suppress this.
Curious, with 0.16.1, were you seeing colorization of Pulumi output?
t
tall-librarian-49374
12/24/2018, 4:19 PM
I see yellow now in 0.16.4... I don't remember about 0.16.1 😋