py/repl: Fix case where shorter names are shadowed by longer names.
Previous to this patch, if "abcd" and "ab" were possible completions
to tab-completing "a", then tab would expand to "abcd" straight away
if this identifier appeared first in the dict.
diff --git a/py/repl.c b/py/repl.c
index 649ade1..736dfa3 100644
--- a/py/repl.c
+++ b/py/repl.c
@@ -187,7 +187,9 @@
match_str = d_str;
match_len = d_len;
} else {
- for (mp_uint_t j = s_len; j < match_len && j < d_len; ++j) {
+ // search for longest common prefix of match_str and d_str
+ // (assumes these strings are null-terminated)
+ for (mp_uint_t j = s_len; j <= match_len && j <= d_len; ++j) {
if (match_str[j] != d_str[j]) {
match_len = j;
break;