Add line break

- When actually view with an md viewer, like inlyne, add a line break
  after each back link.

src/main.rs

@@ -231,7 +231,7 @@ async fn create_back_links(output_dir: &str, this_day: &DateTime<Local>) -> Resu
                 .with_context(|| format!("Could not parse {day} as date!"))?;
             let first = first.trim_start_matches(&format!("# {} - ", day.format("%Y-%m-%d")));
             let link = format!(
-                "[{} - {}](diary:{})",
+                "[{} - {}](diary:{})  ",
                 (day - *this_day).to_relative(),
                 first.trim(),
                 b.trim_end_matches(".md")