make condition brackets optional

test/parser/test_conditional.rb

@@ -3,16 +3,23 @@ require_relative "helper"
 class TestConditional < MiniTest::Test
   # include the magic (setup and parse -> test method translation), see there
   include ParserHelper
+  
+  def test_conditional_brackets
+    check("(0)")
+  end
+  def test_conditional_no_brackets
+    check("0")
+  end
     
-  def test_conditional
-    @string_input = <<HERE
-if(0) 
+  def check cond
+    input = <<HERE
+
   42
 else
   667
 end
 HERE
-@string_input.chop!
+    @string_input = "if #{cond} " + input.chop!
     @parse_output = {:if=>"if", :conditional=>{:integer=>"0"}, 
     :if_true=>{:expressions=>[{:integer=>"42"}], :else=>"else"}, 
     :if_false=>{:expressions=>[{:integer=>"667"}], :end=>"end"}}