Edited docs/templates.txt changes from [6533]. Let's not smash people over the...

Edited docs/templates.txt changes from [6533]. Let's not smash people over the head with an only marginally important piece of information in the very first paragraph of the document.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6770 bcc190cf-cafb-0310-a4f2-bffc1f526a37