Fix erroneous formatting in the docs for 'try'

Author: alco

lib/elixir/lib/kernel/special_forms.ex

@@ -1675,7 +1675,7 @@ defmodule Kernel.SpecialForms do
  This means the VM no longer needs to keep the stacktrace once inside
  an else clause and so tail recursion is possible when using a `try`
  with a tail call as the final call inside an else clause. The same
- is `true` for `rescue` and `catch` clauses.
+ is true for `rescue` and `catch` clauses.
 
  ## Variable handling