Checking and updating Python files and images

src/Python/IO/WriteTriangleToFile.py

src/Python/Plotting/ScatterPlot.py

src/Python/Plotting/SpiderPlot.py

src/Python/PolyData/ColoredTriangle.py

src/Python/PolyData/ImplicitPolyDataDistance.py

src/Python/PolyData/PolyDataContourToImageData.py

src/Python/PolyData/RuledSurfaceFilter.py

src/Python/PolyData/SmoothMeshGrid.py

src/Python/PolyData/SolidColoredTriangle.py

src/Python/PolyData/TriangleColoredPoints.py

src/Python/PolyData/TriangleCornerVertices.py

src/Python/PolyData/TriangleCorners.py

src/Python/PolyData/WarpVector.py