[Integrated] RFR: Fix problem with specifying a single issue with shorthand syntax

[Robin Westberg]

Changeset: ef0c6f6c
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-04-22 11:26:39 +0000
URL:       https://git.openjdk.java.net/skara/commit/ef0c6f6c

Fix problem with specifying a single issue with shorthand syntax

Reviewed-by: ehelin

! bots/pr/src/main/java/org/openjdk/skara/bots/pr/IssueCommand.java
! bots/pr/src/test/java/org/openjdk/skara/bots/pr/IssueTests.java