m

src/lib.rs

@@ -244,7 +244,7 @@ pub fn format_seq(name: &str, sequence: &str, line_size: usize) -> String {
     .chunks(line_size)
     .map(|c| c.iter().collect::<String>())
     .collect::<Vec<String>>()
-    .join("");
+    .join("\n");
     format!(">{name}\n{res}")
 }