Unquoted target directory variable in package template can fail for paths with spaces

[glopesdev]

The default package template provides a default launch profile for debugging specified in launchSettings.json which points the bootstrapper to the target directory:

"commandLineArgs": "--lib:$(TargetDir)."

Due to the way the bootstrapper parses command-line arguments, if the $(TargetDir) environment variable expands into a path with spaces, the components of the path before and after spaces may be interpreted as arguments rather than as part of the path.