c1afadf Update to 1.9.4 (#1577187), fix FTBFS (#1604827)

Authored and Committed by churchyard 5 years ago
    Update to 1.9.4 (#1577187), fix FTBFS (#1604827)
    
    Uses CPython 3.6 in tests that compare results, due to PEP479
    
        
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