Description:
As you can see in the attachment screenshot, justification works correctly when all words of the line are in Persian (first paragraph). But as appeared in first line of second paragraph (second paragraph is same as first but by substitution of one Persian word with an English one), you see that because word "paragraph" is placed in 4th line, we see space character instead of kashida character like below:
بـ  ـرای
and 
نمـ  ـایش
and
مشـ  ـکل

Steps to Reproduce:
1.Write a paragraph with long Persian words (without English words) so that justification needs kashida inside words
2.You should see that justification correctly adds kashida inside words.
3.Add an English word to a line that contains kashida.

Actual Results:  
We see that in the line with English word, space character " " instead of kashida "ـ" is put inside words of justified line.

Expected Results:
Justification should remain correct with kashida in words.


Reproducible: Always

User Profile Reset: No

Additional Info:


User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36