[Integrated] RFR: Fix the HunkCoalescer again

[Erik Helin]

Changeset: f265d888
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2019-10-21 06:34:53 +0000
URL:       https://git.openjdk.java.net/skara/commit/f265d888

Fix the HunkCoalescer again

Reviewed-by: rwestberg, jvernee

! webrev/src/main/java/org/openjdk/skara/webrev/HunkCoalescer.java