Squashed 'release-tools/' changes from 1d60e779..7bc70e52

7bc70e52 Merge pull request #129 from pohly/squash-documentation
e0b02e72 README.md: document usage of --squash
316cb957 Merge pull request #132 from yiyang5055/bugfix/boilerplate
26e2ab10 fix: default boilerplate path
1add8c18 Merge pull request #133 from pohly/kubernetes-1.20-tag
3e811d6c prow.sh: fix "on-master" prow jobs

git-subtree-dir: release-tools
git-subtree-split: 7bc70e5264a5ce5f47780bdbc6c7b7f4e79243fa

prow.sh

@@ -71,7 +71,7 @@ version_to_git () {
     version="$1"
     shift
     case "$version" in
-        latest) echo "master";;
+        latest|master) echo "master";;
         release-*) echo "$version";;
         *) echo "v$version";;
     esac