Implement the new fields for clock.

src/parser/clock.rs

@@ -40,7 +40,7 @@ pub(crate) fn clock<'b, 'g, 'r, 's>(
     let (remaining, (timestamp, duration)) = clock_timestamp(context, remaining)?;
     let (remaining, _) = tuple((space0, org_line_ending))(remaining)?;
 
-    let (remaining, _trailing_ws) =
+    let (remaining, post_blank) =
         maybe_consume_trailing_whitespace_if_not_exiting(context, remaining)?;
     let source = get_consumed(input, remaining);
     Ok((
@@ -54,6 +54,7 @@ pub(crate) fn clock<'b, 'g, 'r, 's>(
             } else {
                 ClockStatus::Running
             },
+            post_blank: post_blank.map(Into::<&str>::into),
         },
     ))
 }