Do not include whitespace at the end of value.

src/types/object.rs

@@ -150,6 +150,7 @@ pub struct OrgMacro<'s> {
     pub source: &'s str,
     pub macro_name: &'s str,
     pub macro_args: Vec<&'s str>,
+    pub macro_value: &'s str,
 }
 
 #[derive(Debug, PartialEq)]