Add more verbose messages when using --initialize-from and --resume (#5231)

* Add more verbose messages when using --initialize-from and resume

* Fix typo

* Add periods

ml-agents/mlagents/trainers/model_saver/torch_model_saver.py

         # This argument is mainly for initialization of the ghost trainer's fixed policy.
         reset_steps = not self.load
         if self.initialize_path is not None:
+            logger.info(f"Initializing from {self.initialize_path}.")
+            logger.info(f"Resuming from {self.model_path}.")
             self._load_model(self.model_path, policy, reset_global_steps=reset_steps)
 
     def _load_model(

ml-agents/mlagents/trainers/stats.py

         for file_name in os.listdir(directory_name):
             if file_name.startswith("events.out"):
                 logger.warning(
-                    f"Deleting TensorBoard data {file_name} that was left over from a"
+                    f"Deleting TensorBoard data {file_name} that was left over from a "
                     "previous run."
                 )
                 full_fname = os.path.join(directory_name, file_name)