Unnecessary ZWNJ inserted before ها after non-left-joining letters

[amirivojdan]

Bug

Normalizer inserts a ZWNJ (\u200c) before ها when the preceding letter is non-left-joining (ا, د, ذ, ر, ز, ژ, و). The ZWNJ is unnecessary here since these letters already produce a visual gap.

Reproduce

from hazm import Normalizer
print(repr(Normalizer().normalize("بندر ها")))

Actual: 'بندر\u200cها'
Expected: 'بندرها'

Works correctly for left-joining letters: "کتاب ها" → "کتاب\u200cها"