views.py: switch double quotes to single quotes
views.py: switch double quotes to single quotes

This change is dictated by the need to stay consistent.

pbanaszkiewicz/amy,vahtras/amy,pbanaszkiewicz/amy,wking/swc-amy,pbanaszkiewicz/amy,wking/swc-amy,vahtras/amy,swcarpentry/amy,shapiromatron/amy,shapiromatron/amy,wking/swc-amy,wking/swc-amy,swcarpentry/amy,shapiromatron/amy,swcarpentry/amy,vahtras/amy