TabError when compiling util_NRExtrudeOverlapGrid.py

Because the util_NRExtrudeOverlapGrid.py 'script' has a .py extension, conda-build (and others) think it's a module, so attempt to py_compile it, which results in a TabError because of inconsistent use of tabs and spaces for indentation:

$ python3 -m py_compile MonteCarloMarginalizeCode/Code/bin/util_NRExtrudeOverlapGrid.py
Sorry: TabError: inconsistent use of tabs and spaces in indentation (util_NRExtrudeOverlapGrid.py, line 366)