Fixed lots of errors and missing code

[denzenn]

1. There was missing code on line 5 and i completed the code and switched (w)write to (r)read .
2. there were missing backslashes (\) on line 13, it was originally \ it meant nothing changed and four represents two backslashes.
3. on line 20 template start began with {"German":" instead of {"English":" and i changed that.
4. on line 28 It was meant to be german_file not english_file so i changed that.
5. on line 30 you can see template_end template_mid template_start was not in the correct order.
6. on line 36 it corresponds to write_file_list not read.
7. on line 38 if it didn't have file it would have wrote empty lines.
8. on line 46 and 48 train_file_list_to_json and path_to_file_list were swapped and could've messed up the whole code.