Fix typos in printout messages.

gklearn/preimage/median_preimage_generator.py

@@ -145,7 +145,7 @@ class MedianPreimageGenerator(PreimageGenerator):
 		if self._verbose:
 			print()
 			print('================================================================================')
-			print('Finished generalization of preimages.')
+			print('Finished generation of preimages.')
 			print('--------------------------------------------------------------------------------')
 			print('The optimized edit cost constants:', self.__edit_cost_constants)
 			print('SOD of the set median:', self.__sod_set_median)

gklearn/preimage/random_preimage_generator.py

@@ -210,7 +210,7 @@ class RandomPreimageGenerator(PreimageGenerator):
 		if self._verbose:
 			print()
 			print('=============================================================================')
-			print('Finished generalization of preimages.')
+			print('Finished generation of preimages.')
 			print('-----------------------------------------------------------------------------')
 			print('Distance in kernel space for the best graph from dataset:', self.__k_dis_dataset)
 			print('Distance in kernel space for the preimage:', self.__k_dis_preimage)