correct api doc examples and a typo

doc/python_api/examples/bpy.types.Operator.4.py

@@ -22,7 +22,7 @@ class CustomDrawOperator(bpy.types.Operator):
     my_string = bpy.props.StringProperty(name="String Value")
 
     def execute(self, context):
-        print()
+        print("Test", self)
         return {'FINISHED'}
 
     def invoke(self, context, event):

doc/python_api/examples/bpy.types.Operator.5.py

@@ -31,6 +31,7 @@ class ModalOperator(bpy.types.Operator):
 
     def execute(self, context):
         context.object.location.x = self.value / 100.0
+        return {'FINISHED'}
 
     def modal(self, context, event):
         if event.type == 'MOUSEMOVE':  # Apply