STYLE: vtkTestingObjectFactory: Fix typo in comment

Former-commit-id: deba7c26

CMake/vtkTestingObjectFactory.hxx

@@ -20,7 +20,7 @@
 // Some vtk examples and tests need to perform differently when they
 // are run as tests versus when they are run as individual
 // programs. Many tests/examples are interactive and eventually call
-// vtkRenderWindowInteration::Start() to initialie the
+// vtkRenderWindowInteration::Start() to initialize the
 // interaction. But, when run as tests, these programs should
 // exit. This factory overrides vtkRenderWindowInteractor so that the
 // Start() method just returns.