git: openjdk/skara: Improve the previous empty hunks fix

[duke]

Changeset: 7a455364
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2019-08-16 14:01:52 +0000
URL:       https://git.openjdk.java.net/skara/commit/7a455364

Improve the previous empty hunks fix

Reviewed-by: ehelin

! webrev/build.gradle
! webrev/src/main/java/org/openjdk/skara/webrev/FramesView.java
! webrev/src/test/java/org/openjdk/skara/webrev/WebrevTests.java