Make append function add newline before appending

src/internal/files.rs

@@ -32,7 +32,9 @@ pub fn copy_file(path: &str, destpath: &str) {
 pub fn append_file(path: &str, content: &str) -> std::io::Result<()> {
     log::info!("Append '{}' to file {}", content.trim_end(), path);
     let mut file = OpenOptions::new().append(true).open(path)?;
+    file.write_all("\n".as_bytes())?;
     file.write_all(content.as_bytes())?;
+    file.write("\n".as_bytes())?;
     Ok(())
 }