diff --git a/src/main/java/org/jenkinsci/plugins/ansible/AbstractAnsibleInvocation.java b/src/main/java/org/jenkinsci/plugins/ansible/AbstractAnsibleInvocation.java
index 9fb9dc7..b5b5ed3 100644
--- a/src/main/java/org/jenkinsci/plugins/ansible/AbstractAnsibleInvocation.java
+++ b/src/main/java/org/jenkinsci/plugins/ansible/AbstractAnsibleInvocation.java
@@ -134,7 +134,11 @@ public ArgumentListBuilder appendExtraVars(ArgumentListBuilder args) {
                 // assuming Groovy representation for Boolean values
                 if (value.equals("true") || value.equals("false")) {
                     // JSON format is required for Boolean variables
-                    sb.append("{\"").append(envVars.expand(var.getKey())).append("\":").append(value).append("}");
+                    sb.append("{\"")
+                            .append(envVars.expand(var.getKey()))
+                            .append("\":")
+                            .append(value)
+                            .append("}");
                 } else {
                     sb.append(envVars.expand(var.getKey())).append("=").append(value);
                 }