revlog: update the documentation for `trim_endidx`
The function role drifted since the function was commented.
--- a/mercurial/cext/revlog.c Mon Nov 26 00:21:09 2018 +0100
+++ b/mercurial/cext/revlog.c Mon Nov 26 00:23:12 2018 +0100
@@ -1086,7 +1086,7 @@
return (end_offset - start_offset) + (int64_t)end_size;
}
-/* returns revs[startidx:endidx] without empty trailing revs */
+/* returns endidx so that revs[startidx:endidx] has no empty trailing revs */
static Py_ssize_t trim_endidx(indexObject *self, const Py_ssize_t *revs,
Py_ssize_t startidx, Py_ssize_t endidx)
{