Implement the new fields for entity.

src/parser/entity.rs

@@ -28,7 +28,7 @@ pub(crate) fn entity<'b, 'g, 'r, 's>(
     let (remaining, _) = tag("\\")(input)?;
     let (remaining, (entity_definition, entity_name, use_brackets)) = name(context, remaining)?;
 
-    let (remaining, _trailing_whitespace) =
+    let (remaining, post_blank) =
         maybe_consume_object_trailing_whitespace_if_not_exiting(context, remaining)?;
 
     let source = get_consumed(input, remaining);
@@ -43,6 +43,7 @@ pub(crate) fn entity<'b, 'g, 'r, 's>(
             ascii: entity_definition.ascii,
             utf8: entity_definition.utf8,
             use_brackets,
+            post_blank: post_blank.map(Into::<&str>::into),
         },
     ))
 }