Flask-Babel=0.10.0 breaks cyrillic translations for ngettext

[georgthegreat]

Even if the formula for nplurals returns 2, ngettext uses 1st template for substitution.

Everything returns to normal upon reverting back to 0.9.

Here is the MWE: https://github.com/georgthegreat/mwe

Run it using make debug (you have to setup virtualenv using provided requirements.txt).
Open you browser using http://localhost:5000
The result with Flask-Babel==0.9.0 is:

Format according to rule #0 using locale=ru: 1
Format according to rule #1 using locale=ru: 3
Format according to rule #2 using locale=ru: 8

The result with Flask-Babel==0.10.0 is:

Format according to rule #0 using locale=ru: 1
Format according to rule #1 using locale=ru: 3
Format according to rule #1 using locale=ru: 8

Third line differs and this is the bug introduced.

[TkTech]

Thank you for the ticket, I'm taking a look at this.

[TkTech]

So that required diving into the cpython and babel gettext implementations. Fun times.

@georgthegreat give the master branch a try.

[georgthegreat]

Thanks!
I've checked version 0.11.1 - works fine for me.