[1.5.X] Fixed #19335 - Typo and cleanups in docs/topics/class-based-views/index.txt
[1.5.X] Fixed #19335 - Typo and cleanups in docs/topics/class-based-views/index.txt

Backport of e2b1808196 from master

hasadna/django,imtapps/django-imt-fork,bliti/django-nonrel-1.5,alx-eu/django,hasadna/django,ccn-2m/django,ccn-2m/django,ccn-2m/django,ccn-2m/django,bliti/django-nonrel-1.5,alx-eu/django,imtapps/django-imt-fork,alx-eu/django,bliti/django-nonrel-1.5,imtapps/django-imt-fork,hasadna/django,alx-eu/django