tests/appendop2.sub

   1 POSIXLY_CORRECT=1
   2 x=2
   3 x+=5 eval printf '"$x "'
   4 echo "$x"
   5
   6 unset x
   7 typeset -i x=2
   8 x+=5 eval printf '"$x "'
   9 echo "$x"
  10
  11 a=1
  12 a+=4
  13 echo $a
  14
  15 # idiotically, ksh93 makes these two cases differ (?)
  16 a+=5 printenv a
  17 a+=5 eval printf '"$a "'
  18 echo $a