Improve safety

This way, paths with $ symbols or other fanciness won't be expanded.
However, paths with single quotes will cause errors; we would have to
escape those to handle all (?) errors.

create_python_for_vscode.sh

@@ -10,7 +10,7 @@ PYTHONWRAPPER="${ABSOLUTE_PATH}"/python
 echo '#!/bin/bash
 module purge 2> /dev/null
 deactivate 2> /dev/null
-source "'"${ABSOLUTE_PATH}"'"/activate.sh
+source '"'${ABSOLUTE_PATH}'"'/activate.sh
 python "$@"
 ' > "${PYTHONWRAPPER}"