From fccf17521aeec7438785a132434137f266474119 Mon Sep 17 00:00:00 2001
From: Tom Collins <tom.collins@digi.com>
Date: Mon, 9 Mar 2020 11:39:44 -0700
Subject: [PATCH] py/objstr: Remove duplicate % in error string.

The double-% was added in 11de8399fe5f9ef54589b14470faf8d4fcc5ccaa (Jun
2014) when such errors were formatted with printf.  But then
55830dd9bf4fee87c0a6d3f38c51614fea0eb483 (Dec 2018) changed
mp_obj_new_exception_msg() to not format the message, as discussed
in #3004.  So such error strings are no longer formatted and a % is just
that.
---
 py/objstr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/py/objstr.c b/py/objstr.c
index aba03491db..aa35d84a8e 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -1523,7 +1523,7 @@ STATIC mp_obj_t str_modulo_format(mp_obj_t pattern, size_t n_args, const mp_obj_
                     size_t slen;
                     const char *s = mp_obj_str_get_data(arg, &slen);
                     if (slen != 1) {
-                        mp_raise_TypeError("%%c needs int or char");
+                        mp_raise_TypeError("%c needs int or char");
                     }
                     mp_print_strn(&print, s, 1, flags, ' ', width);
                 } else if (arg_looks_integer(arg)) {