enter four spaces when there are no matches

scottbelden · scottbelden · commit 786cb40073dc · 2019-05-07T13:55:20.000-04:00
diff --git a/py/repl.c b/py/repl.c
@@ -210,6 +210,10 @@ size_t mp_repl_autocomplete(const char *str, size_t len, const mp_print_t *print
 
             // nothing found
             if (q_first == 0) {
+                if (s_len == 0) {
+                    *compl_str = "    ";
+                    return 4;
+                }
                 // If there're no better alternatives, and if it's first word
                 // in the line, try to complete "import".
                 if (s_start == org_str) {
