Update some more recent tests to use /usr/bin/env to find bash

The recentl-applied patch had grown stale, so update the tests that had
been created since it was originally written.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/multipart b/test/multipart
index 80da0b45..7757b377 100755
--- a/test/multipart
+++ b/test/multipart
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 test_description="output of multipart message"
 . ./test-lib.sh