Fix trailing whitespace

trim trailing whitespace.................................................Failed
- hook id: trailing-whitespace
- exit code: 1
- files were modified by this hook

Fixing app/templates/account/certify.html
Fixing app/__init__.py
Fixing app/templates/auth/SignUp.html
Fixing app/templates/account/blocked.html
Fixing app/templates/account/unauthorized.html
Fixing app/static/scripts/function.js
Fixing tasks.py