Merge pull request #14188 from s-hadinger/berry_string_format

Berry fix string.format crash

lib/libesp32/berry/src/be_strlib.c

@@ -578,7 +578,7 @@ static int str_format(bvm *vm)
                 break;
             case 's': {
                 const char *s = be_tostring(vm, index);
-                int len = be_strlen(vm, 2);
+                int len = be_strlen(vm, index);
                 if (len > 100 && strlen(mode) == 2) {
                     be_pushvalue(vm, index);
                 } else {

lib/libesp32/berry/tests/string.be

@@ -39,3 +39,44 @@ s="azerty"
 assert(s[1..2] == "ze")
 assert(s[1..] == "zerty")
 assert(s[1..-1] == "zerty")
+
+#- string ranges -#
+s="azertyuiop"
+assert(s[0] == "a")
+assert(s[0..1] == "az")
+assert(s[0..2] == "aze")
+assert(s[0..10] == s)