code quality improvement

Author: Rakshil Modi

awscli/customizations/s3/results.py

@@ -124,12 +124,12 @@ def _on_failure(self, future, e):
             if isinstance(e, FatalError):
                 error_result_cls = ErrorResult
             self._result_queue.put(error_result_cls(exception=e))
-        else:
-            if self._is_precondition_failed(e):
+        elif self._is_precondition_failed(e):
                 error_message = f"as it already exists on {self._dest}"
                 warning = create_warning(self._src, error_message, True)
                 self._result_queue.put(warning)
                 return 
+        else :
             self._result_queue.put(
                 FailureResult(
                     transfer_type=self._transfer_type,

awscli/customizations/s3/subcommands.py

@@ -646,9 +646,10 @@
     'name': 'no-overwrite',
     'action': 'store_true',
     'help_text': (
-        "To only upload files that don't exist at the destination"
+        "This flag prevents overwriting of files at the destination. With this flag, "
+        "only the files not present at the destination will be transferred "
+        "and others will be skipped during the operation."
     ),
-
 }
 
 TRANSFER_ARGS = [