Simulate trailing whitespace in empty greater blocks just like drawers.

src/parser/sexp.rs

@@ -1,4 +1,3 @@
-use crate::error::Res;
 use std::collections::HashMap;
 
 use nom::branch::alt;
@@ -17,6 +16,8 @@ use nom::sequence::delimited;
 use nom::sequence::preceded;
 use nom::sequence::tuple;
 
+use crate::error::Res;
+
 #[derive(Debug)]
 pub enum Token<'s> {
     Atom(&'s str),