py/pberror: fix typo in invalid operation error
@@ -83,7 +83,7 @@ void pb_assert(pbio_error_t error) {
"\n");
static const MP_DEFINE_STR_OBJ(msg_invalid_op_obj, "\n\n"
"The requested operation is not valid in the current state:\n"
- "--> Check the documentation to for required conditions.\n"
+ "--> Check the documentation for required conditions.\n"
"--> Check the line in your script that matches\n"
" the line number given in the 'Traceback' above.\n"
"\n");
