Updated for latest Pipeline fixes

JENKINS-29711 was fixed and stage step now uses curly braces

Jenkinsfile

@@ -4,30 +4,30 @@
 properties([[$class: 'BuildDiscarderProperty',
                 strategy: [$class: 'LogRotator', numToKeepStr: '10']]])
 
-stage 'Build'
+stage ('Build') {
 
-node {
-  // Checkout
-  checkout scm
+  node {
+    // Checkout
+    checkout scm
 
-  // install required bundles
-  sh 'bundle install'
+    // install required bundles
+    sh 'bundle install'
 
-  // build and run tests with coverage
-  sh 'bundle exec rake build spec'
+    // build and run tests with coverage
+    sh 'bundle exec rake build spec'
 
-  // Archive the built artifacts
-  archive (includes: 'pkg/*.gem')
+    // Archive the built artifacts
+    archive (includes: 'pkg/*.gem')
 
-  // publish html
-  // "target:" shouldn't be needed, https://issues.jenkins-ci.org/browse/JENKINS-29711.
-  publishHTML (target: [
-      allowMissing: false,
-      alwaysLinkToLastBuild: false,
-      keepAll: true,
-      reportDir: 'coverage',
-      reportFiles: 'index.html',
-      reportName: "RCov Report"
-    ])
+    // publish html
+    publishHTML ([
+        allowMissing: false,
+        alwaysLinkToLastBuild: false,
+        keepAll: true,
+        reportDir: 'coverage',
+        reportFiles: 'index.html',
+        reportName: "RCov Report"
+      ])
 
+  }
 }