[Rev 02] RFR: 375: Improve Merge PR RFR email

[Robin Westberg]

> Hi all,
> 
> Please review this change that improves the RFR emails sent out for Merge PRs.
> 
> Best regards,
> Robin

Robin Westberg has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains six commits:

 - Merge remote-tracking branch 'upstream/master' into merge_pr_rfr
   
   # Conflicts:
   #	bots/pr/src/main/java/org/openjdk/skara/bots/pr/CheckRun.java
 - Rename to PullRequestUtils
 - Make PullRequestInstance simpler
 - Avoid emitting empty webrevs
 - Generate merge webrevs from the to-be-final merge commit
 - Move reusable parts of PullRequestInstance into forge

-------------

Changes: https://git.openjdk.java.net/skara/pull/591/files
 Webrev: https://webrevs.openjdk.java.net/skara/591/webrev.02
  Stats: 1074 lines in 14 files changed: 578 ins; 388 del; 108 mod
  Patch: https://git.openjdk.java.net/skara/pull/591.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/591/head:pull/591

PR: https://git.openjdk.java.net/skara/pull/591