[HarfBuzz] Regression test Bengali (0.9.5 VS 0.9.14)

[datao zhang]

Hi all: After compare harfbuzz output (0.9.5 and 0.9.14), I find 5 main differences. It seems that some change are not expected.  Please argue if you have different opinion. 
 
 
 

  1. স্ব্য়ং
  sa,virama,ba,virama,ya,nukta,anusvara

 
     In 0.9.14 version, (sa,virama,ba) not form ligature. please refer to attachement 1.png 
 
 
 

  2. রেকর্ডিং‌এর
  ra,_e,ka,ra,virama,dda,_i,anusvara,zwnj,e,ra

 
    In 0.9.14 version, the top of (_i) is too long, it should align with vertical stem of dda . please refer to attachement  2.png 
 
 
 

  3. আশ্র্য়
  aa,sha,virama,ra,virama,ya,nukta

 
   In 0.9.14 version, (sha,virama,ra) not form ligature, please refer to attachment 3.png
 
 
 

  4. ক্রমান্ব্য়ে
  ka,virama,ra,ma,_aa,na,virama,ba,virama,ya,nukta,_e

 
   In 0.9.14 version, (na,virama,ba) not form ligature and the matra (_e)  should be before (ya,nukta), after (virama). please refer to attachment 4.png 
 
 
 

  5. প্র্য়োজন।
  pa,virama,ra,virama,ya,nukta,_o,ja,na,danda

 
   In 0.9.14 version, (pa, virama,ra) not form ligature. please refer to attachment 5.png   Br,Dean 		 	   		  
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