Extra leading spaces seem to affect the parsing of boolean conditions

[brutusyhy]

As I noted under a different issue, having leading spaces in a line could affect the parsing of boolean conditions inside curly brackets. Here's a simple test that demonstrates this issue:

        [Test()]
        public void TestLineBreakAfterChoiceLabel()
        {
            Story story1 = CompileString(@"
* (label) 
{true} choice text
");
            Story story2 = CompileString(@"
* (label) 
 {true} choice text
");
            story1.Continue();
            String result1 = story1.currentChoices[0].text; // "choice text"
            story2.Continue();
            String result2 = story2.currentChoices[0].text; // "true choice text"
        }