Erroneous detection of "installArguments"

[bc3tech]

This line causes erroneous detection and failure of packages that use any variable name that contains installArguments as a substring.

Real-world effect can be seen here where the uninstall script uses a registry key called UninstallArguments and is being caught & falsely failed by this validation check.

seems like a better check would be .Contains("$installArguments"), etc

[bc3tech]

Now impacting a stable push here