not working for zero width non-joiner

[Mahdizade]

get_display function in bidi.algorithm module skip zero width non-joiner character.

In [1]: from bidi.algorithm import get_display

In [2]: raw_text = u'سل‌ام'

In [3]: print(len(raw_text))
5

In [4]: text = get_display(raw_text)

In [5]: print(len(text))
4

In [6]: print(text)
مالس