Use f-string

Author: Twixes

somsiad.py

@@ -579,7 +579,7 @@ def summarize_mem(*, key_type='lineno', limit=9):
               % (index, filename, frame.lineno, stat.size / 1024))
         line = linecache.getline(frame.filename, frame.lineno).strip()
         if line:
-           results[-1] += '\n       %s' % line
+           results[-1] += f'\n       {line}'
 
     other = top_stats[limit:]
     if other: