fix(bin): add missing newline in override mode (#264)

Signed-off-by: Cheng Chen <ccqmpux@gmail.com>

Author: dpxcc

sqllogictest-bin/src/main.rs

@@ -1016,6 +1016,8 @@ async fn update_test_file<T: io::Write, M: MakeConnection>(
         &filename.to_string_lossy(),
     )?;
 
+    writeln!(out)?;
+
     let Item {
         filename,
         outfilename,