Floatformat is rounding off incorrectly.

[Akash Deshpande]

I think the below changes broke/caused issues in floatformat

​https://github.com/django/django/commit/12f7928f5a455e330c0a7f19bc86b37baca12811

Easiest way to replicate the issue is

1. Create a simple view with a template

views.py

def test(request):

return render('test.html')

test.html

{{ 331.44999999999|floatformat:-1 }}

The above should return 331.5, but returns 331.4. This changed in django 1.11. (It returned 331.5 in django 1.8.X )