Sync up all release note related docs with the latest process/procedures.

docs/devel/pull-requests.md

@@ -38,6 +38,7 @@ Documentation for other releases can be found at
 - [Life of a Pull Request](#life-of-a-pull-request)
   - [Before sending a pull request](#before-sending-a-pull-request)
   - [Release Notes](#release-notes)
+    - [Reviewing pre-release notes](#reviewing-pre-release-notes)
   - [Visual overview](#visual-overview)
 - [Other notes](#other-notes)
 - [Automation](#automation)
@@ -73,12 +74,34 @@ The following will save time for both you and your reviewer:
 
 ## Release Notes
 
-1. Your PR title is the **release note** you want published at release time.
-1. Release note labels are only needed on master branch PRs.
+This section applies only to pull requests on the master branch.
+
 1. All pull requests are initiated with a `release-note-label-needed` label.
 1. For a PR to be ready to merge, the `release-note-label-needed` label must be removed and one of the other `release-note-*` labels must be added.
 1. `release-note-none` is a valid option if the PR does not need to be mentioned
  at release time.
+1. The PR title is the **release note** you want published at release time.
+  * NOTE: PR titles are mutable and should reflect a release note friendly
+    message for any `release-note-*` labeled PRs.
+
+The only exception to these rules is when a PR is not a cherry-pick and is
+targeted directly to the non-master branch.  In this case, a `release-note-*`
+label is optional (and not enforced).
+
+### Reviewing pre-release notes
+
+**NOTE: THIS TOOLING IS NOT YET AVAILABLE, BUT COMING SOON!**
+
+At any time, you can see what the release notes will look like on any branch.
+
+```
+$ git pull https://github.com/kubernetes/release
+$ RELNOTES=$PWD/release/relnotes
+$ cd /to/your/kubernetes/repo
+$ $RELNOTES -man # for details on how to use the tool
+# Show release notes from the last release on a branch to HEAD
+$ $RELNOTES --raw --branch=master
+```
 
 ## Visual overview