Returned errors instead of printing them. Added allowed characters '0123456789 +-'.

Added a few comments and got rid of the extra spaces on each line.

added a filed called arithmetic_arranger.py so the import might work correctly.

Mostly done I think, but untested because I was unable to get the module to import correctly to main.py. Also missing some errors and the show answers option.

Merge pull request #2 from Start-Understanding-Python-Association/dbarthelmeh-patch-2

Create test_module.py

Create arithmetic-arranger.py

Create main.py

Update README.md

Merge pull request #1 from Start-Understanding-Python-Association/dbarthelmeh-patch-1

Update README.md

Initial commit