Neaten-up the inner-loop logic.

4a91d213 · Raymond Hettinger · 9ce52e3b · 4a91d213
Commit 4a91d213 authored Nov 03, 2015 by Raymond Hettinger
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Modules/_collectionsmodule.c Modules/_collectionsmodule.c +3 -3

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--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -1053,13 +1053,13 @@ deque_index(dequeobject *deque, PyObject *args)
        }
    }
-    n = stop - i;
+    n = stop - i + 1;
-    while (n--) {
+    while (--n) {
        CHECK_NOT_END(b);
        item = b->data[index];
        cmp = PyObject_RichCompareBool(item, v, Py_EQ);
        if (cmp > 0)
-            return PyLong_FromSsize_t(stop - (n + 1));
+            return PyLong_FromSsize_t(stop - n);
        if (cmp < 0)
            return NULL;
        if (start_state != deque->state) {