Fix control sequence emission

[Forgind]

Context

When building with the MSBuild server, you could sometimes see VT100 control character sequences rather than interpreting them as desired. This fixes that.

Changes Made

Tell the console to expect VT100.

Testing

Built before and after; it displayed properly with this change.

[AR-May]

LGTM

[danmoseley]

Does this work on Windows 7?

[Forgind]

Does this work on Windows 7?

I don't know nearly enough about the differences between windows 7 and windows 11 to have a clue. Is there some reason we should expect it to fail? I can spin up a VM to test if you'd like.

[danmoseley]

Is there some reason we should expect it to fail?

simply that there was considerable investment since Windows 7 in better supporting standard terminal output. I have zero context on this particular API but it struck me that it could have been affected.

[rainersigwald]

I think the win7 question is a good one that needs to be thought through. It may introduce a limitation on the MSBuild Server stuff (but I don't think it's worth a huge amount of effort: I wouldn't be too sad if the answer was "disable MSBuild server on Win7").

[Forgind]

I spun up a windows 7 VM and overwrote the MSBuild assemblies in the 6.0.300 SDK with assemblies from this build. When I tried building in cmd.exe, output with MSBUILDUSESERVER=1 or undefined looked the same. However, it took several seconds to start up when MSBUILDUSESERVER was enabled—not entirely sure why. In any case, I think this works properly on windows 7, but it seems like maybe people using windows 7 will want to opt out anyway.