[Integrated] RFR: 235: git-webrev can't handle empty files

[Erik Helin]

Changeset: f99220d3
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-01-21 08:55:33 +0000
URL:       https://git.openjdk.java.net/skara/commit/f99220d3

235: git-webrev can't handle empty files

Reviewed-by: rwestberg

! webrev/src/main/java/org/openjdk/skara/webrev/AddedPatchView.java
! webrev/src/main/java/org/openjdk/skara/webrev/RemovedPatchView.java