not using format strings

main.py

@@ -95,7 +95,7 @@ if __name__ == "__main__":
     args = parser.parse_args()
     sys.stderr = open(osp.join(osp.dirname(__file__),'stderr.log'),'w')
     args.arg = ' '.join(args.arg)
-        
+
     if not args.arg.isdecimal():
         # save on import time slightly
         from print2d import print2d

print2d.py

@@ -18,9 +18,9 @@ def print2d(l,datetime_format = "%A, %B %e, %Y %H:%M:%S",seperator= ' | ',spacer
 
     fmt_row = '{content}'
     if l_end:
-        fmt_row = f'{l_end} ' + fmt_row
+        fmt_row = '{} {}'.format(l_end,fmt_row)
     if r_end:
-        fmt_row = fmt_row + f' {r_end}'
+        fmt_row = '{} {}'.format(fmt_row,r_end)
 
     done = []
     for row in l: