doc for special forms missing special form name

[mfikes]

For example:

cljs.user=> (doc if)
-------------------------

   (if test then else?)
  Evaluates test. If not the singular values nil or false,
  evaluates and yields then, otherwise, evaluates and yields else. If
  else is not supplied it defaults to nil.
nil

Right after the dashed lines would go the string if

[anmonteiro]

fixed dd363a8