Some functions are wrapped into allow_lazy incorrectly

[Alexey Boriskin]

allow_lazy() requires more than one argument. Second and further arguments must be types.
There are a few functions which are wrapped into allow_lazy without *resultclasses specified.
Namely:

• django.utils.html.strip_tags
• django.utils.text.Truncator.chars
• django.utils.text.Truncator.words
• django.utils.text.recapitalize
• django.utils.text.phone2numeric
• django.utils.text.unescape_string_literal

IPython session, which demonstrates code broken because of that:

In [1]: from django.utils.functional import lazy
In [2]: from django.utils.encoding import force_text
In [3]: from django.utils import six
In [4]: from django.utils.html import strip_tags
In [5]: promise = lazy(lambda:u'hello', six.text_type)()
In [6]: force_text(promise)
Out[6]: u'hello'
In [7]: promise = lazy(lambda:u'hello', six.text_type)()
In [8]: stripped = strip_tags(promise)
In [9]: force_text(stripped)
Out[9]: u'<django.utils.functional.__proxy__ object at 0x101f6ca50>'

[Alexey Boriskin]

Thanks to bmispelon for pointing that out.

[Baptiste Mispelon]

I've started working on this on my branch: ​https://github.com/bmispelon/django/compare/allow-lazy-refactor

I hope to fix #20221 and #20223 along with this one.

[Baptiste Mispelon]

I've prepared a pull request for this ticket that include fixes for 3 other ones: ​https://github.com/django/django/pull/1007

[Tim Graham]

No longer merges cleanly.

[Alexey Boriskin]

I've updated bmispelon's patch so it merges cleanly as a pull request 4202:
​https://github.com/django/django/pull/4202

[Tim Graham]

Comments for improvement on the PR.

[Tim Graham]

Correct me if I'm wrong, but based on the sample shell session, I think this is fixed by #25000.