Escape semicolon in property values

[slang25]

Fixes #271

[slang25]

It might be worth making the escape behaviour a bit more complete, opinions welcome:
https://github.com/dotnet/msbuild/blob/ad4df597b038182ff632602c1e2f59f3ed131d76/src/Shared/EscapingUtilities.cs#L284-L310

[phmonte]

@slang25 do you see a way to create a unit test for this scenario?

I believe this problem will not only happen with the ";"

[slang25]

I'll follow up with some tests and a fuller PR soon 🙂

[softlion]

@slang25 do you see a way to create a unit test for this scenario?

I believe this problem will not only happen with the ";"

This happens because of how linux sh/bash interpreter works.

You only need to escape ";" "," and space.