Update README.md

README.md

@@ -15,5 +15,5 @@ def combine_files(input_prefix, num_parts, output_file):
             os.remove(part_file)
 
 
-combine_files('OLtest_part', 2, 'OLtest.db.gz')
+combine_files('OLtest', 2, 'OLtest.db.gz')
 ```