Don't use plural forms without specific numbers

[Axel Hecht]

There are a handful of languages which use the same grammatical form for 1 and, say, 11.

If you're using gettext plurals for a message that doesn't specify the number, you get

"Fix the following error." when there are actually 11 errors down the line.

Example would be ​https://github.com/django/django/blob/master/django/contrib/admin/locale/en/LC_MESSAGES/django.po#L427

#: templates/admin/change_form.html:44 templates/admin/change_list.html:67
#: templates/admin/login.html:17
#: templates/admin/auth/user/change_password.html:27
#: templates/registration/password_change_form.html:20
msgid "Please correct the error below."
msgid_plural "Please correct the errors below."
msgstr[0] ""
msgstr[1] ""

[Axel Hecht]

Example plural rule for reference, Lithuanian uses:

<pluralRules locales="lt">

<pluralRule count="one">n mod 10 is 1 and n mod 100 not in 11..19</pluralRule>
<pluralRule count="few">n mod 10 in 2..9 and n mod 100 not in 11..19</pluralRule>

</pluralRules>

[Marc Egli]

I fixed this by using two separate strings.
​https://github.com/frog32/django/commit/8b10363e08e4404a0023da46baee80f2efcb00b5

There is a post on the i18n mailing list about this:
​https://groups.google.com/forum/?fromgroups#!topic/Django-I18N/Ltt4ljM4WpM

I'll squash these two commits together and file a pull request if no one has problems in their translation.