require 'ripper'
require 'pp'

pp Ripper.sexp('return if in_str == nil')
puts '================'
pp Ripper.sexp('return if in_str==nil')
# >> [:program,
# >>  [[:if_mod,
# >>    [:binary,
# >>     [:vcall, [:@ident, "in_str", [1, 10]]],
# >>     :==,
# >>     [:var_ref, [:@kw, "nil", [1, 20]]]],
# >>    [:return0]]]]
# >> ================
# >> [:program,
# >>  [[:if_mod,
# >>    [:binary,
# >>     [:vcall, [:@ident, "in_str", [1, 10]]],
# >>     :==,
# >>     [:var_ref, [:@kw, "nil", [1, 18]]]],
# >>    [:return0]]]]