BUG: fix syntax error regarding shape attribute
BUG: fix syntax error regarding shape attribute

The error was:

55: Test command: "C:\Program Files\Python37\python.exe" "C:/Dev/ITKExamples/src/Core/Common/GetImageSize/Code.py" "C:/Dev/ITKExamples/Build/src/Core/Common/GetImageSize/Yinyang.png"
55: Test timeout computed to be: 1500
55: itkSize2 ([512, 342])
55: itkSize2 ([512, 342])
55: Traceback (most recent call last):
55:   File "C:/Dev/ITKExamples/src/Core/Common/GetImageSize/Code.py", line 40, in <module>
55:     print(image.shape)
55: AttributeError: 'itkImageUC2' object has no attribute 'shape'
1/1 Test #55: GetImageSizeTestPython ...........***Failed    2.68 sec

InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples