[PATCH] run-tests: fix -i when testcases are used

[Martin von Zweigbergk]

On Tue, Jun 20, 2017 at 9:45 PM, Jun Wu <quark at fb.com> wrote:
> # HG changeset patch
> # User Jun Wu <quark at fb.com>
> # Date 1498019662 25200
> #      Tue Jun 20 21:34:22 2017 -0700
> # Node ID 30a98655ab27976c2020e20909093e2cb678758b
> # Parent  0ce2cbebd74964ffe61e79de8941461bccc9371b
> # Available At https://bitbucket.org/quark-zju/hg-draft
> #              hg pull https://bitbucket.org/quark-zju/hg-draft -r 30a98655ab27
> run-tests: fix -i when testcases are used

What was broken?