simplify regex in test..

ui/fixtures/cmd.auto.json

@@ -14,7 +14,7 @@
 	"title": "Verify modification",
 	"cmd": [ "list", "test.txt" ],
 	"stdin": "y\n",
-	"stdout_re": ".*mimetype:\ttext/plain; charset=us-ascii.*"
+	"stdout_re": "mimetype:\ttext/plain; charset=us-ascii"
 },
 {
 	"title": "Test auto detection of jpeg file",
@@ -26,6 +26,6 @@
 	"title": "Verify modification",
 	"cmd": [ "list", "z.jpg" ],
 	"stdin": "y\n",
-	"stdout_re": ".*mimetype:\timage/jpeg"
+	"stdout_re": "mimetype:\timage/jpeg"
 }
 ]