Log verbose rsync output one line per message

With -v, the whole output was logged as a single Python list.

simple_backup/simple_backup.py

@@ -789,20 +789,17 @@ class Backup:
             returncode = p.wait()
 
         if returncode == 0:
-            if self._verbose:
-                logger.info('rsync: %s', output)
-            else:
-                # May be fewer than two lines, e.g. with --rsync-options q
-                for r in output:
-                    logger.info('rsync: %s', r)
+            # Without -v, only the summary, which may be fewer than two lines (e.g. with --rsync-options q)
+            for r in output:
+                logger.info('rsync: %s', r)
         else:
             self._returncode_log(returncode)
 
             if self._verbose:
-                if returncode in [23, 24]:
-                    logger.warning(output)
-                else:
-                    logger.error(output)
+                level = logging.WARNING if returncode in [23, 24] else logging.ERROR
+
+                for r in output:
+                    logger.log(level, 'rsync: %s', r)
 
         if self._removed_count > 0 and returncode not in [0, 24]:
             # With --remove-before-backup, old backups are already gone if the new one failed