tmpdir: fix usage message ref to TMPDIR formal param

diff --git a/runner/adt-run b/runner/adt-run
index 540b5df928372c826f7b86a77e1229dc041ea881..38e4eb20c8d579325cfae6aa9cf31b8b3c0a733a 100755 (executable)
--- a/runner/adt-run
+++ b/runner/adt-run
@@ -577,7 +577,7 @@ def parse_args():
                help='set LANG on testbed to LANGVAL', default='C')
 
        pa('','--tmp-dir',              type='string', dest='tmp',
-               help='write temporary files to TMPDIR, emptying it'
+               help='write temporary files to TMP, emptying it'
                     ' beforehand and leaving it behind at the end')
        pa('','--log-file',             type='string', dest='logfile',
                help='write the log LOGFILE, emptying it beforehand,'