Fix fixed width area to not consume trailing line break so it can be part of the post-blank.

src/types/lesser_element.rs

@@ -498,13 +498,7 @@ impl<'s> Comment<'s> {
 
 impl<'s> FixedWidthArea<'s> {
     pub fn get_value(&self) -> String {
-        let final_size = self.value.iter().map(|line| line.len()).sum();
-        let mut ret = String::with_capacity(final_size);
-        for line in &self.value {
-            ret.push_str(line);
-        }
-
-        ret
+        self.value.join("\n")
     }
 }