Convert ASP to Python3 and follow PEP-8

As noted on #14570 (closed):

According to PEP 8, one-line docstrings should have the closing “”" on the same line.
I agree, but fixing it here without doing it in all the file looks wierd, so I propose to forget about it for now, and do it later on when converting this file to python3. I plan to do that after all branches are merged and tests are written.

Feature Branch: feature/15198-asp-convert-to-python3-pep8

Parent Task: #14568 (closed)

Related issues

• Blocked by #14570 (closed)
• Blocked by #14572 (closed)

Original created by @u on 15198 (Redmine)