next try of handmade git publisher

Jenkinsfile

@@ -60,7 +60,8 @@ pipeline {
 
         success {
 
-            if ( (env.BRANCH_NAME).startsWith('pr-') ) {
+            script {
+                if ((env.BRANCH_NAME).startsWith('pr-')) {
 
 //                git url: "git@gogs.informatik.hs-fulda.de:SteffenN/Multi-Chess.git",
 //                        credentialsId: 'jenkins_ssh_key',
@@ -70,6 +71,7 @@ pipeline {
                     sh "git commit -am 'Merged ${env.BRANCH_NAME} branch to master'"
                     sh "git push origin master"
                 }
+            }
 
             office365ConnectorSend color: 'good',
                     message: "Build ${currentBuild.fullDisplayName} completed *successfully* (<${BUILD_URL}>).\n\n\n${CUSTOM_SCM_INFO}",