Wrap bodied of <<if in a <<do

[nixin72]

(<<if x 
  (prn 1)
  (prn 2)
 (else>)
  (prn 3))

was expanding to

(if x 
  (prn 1) 
  (prn 2) 
  (prn 3))

Instead of

(if x 
  (do (prn 1)
      (prn 2))
  (prn 3))

Leading to errors there was something besides a binding form at the first form in an <<if branch. This fixes it so that the branches of <<if are wrapped in a <<do.