[Integrated] RFR: Avoid quoting an empty review body

[Robin Westberg]

Changeset: 3d62e289
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-01-20 14:23:43 +0000
URL:       https://git.openjdk.java.net/skara/commit/3d62e289

Avoid quoting an empty review body

Reviewed-by: ehelin

! bots/mlbridge/src/main/java/org/openjdk/skara/bots/mlbridge/ArchiveMessages.java
! bots/mlbridge/src/test/java/org/openjdk/skara/bots/mlbridge/MailingListBridgeBotTests.java