Updated as per Justin's explanation

Bruce Eckel · Bruce Eckel · commit 61d9e213172d · 2016-08-02T11:00:06.000-06:00
diff --git a/build.gradle b/build.gradle
@@ -205,7 +205,9 @@ configure(subprojects - project(':onjava')) {
     }
 }
 
-task verify(type:Exec) << {
-    println("execute 'gradlew run' first")
+task verify(type:Exec) {
     commandLine 'python', 'verify_output.py'
+    doFirst {
+        println("execute 'gradlew run' first")
+    }
 }

Original file line number	Diff line number	Diff line change
`@@ -205,7 +205,9 @@ configure(subprojects - project(':onjava')) {`
`205`	`205`	`}`
`206`	`206`	`}`
`207`	`207`
`208`		`-task verify(type:Exec) << {`
`209`		`- println("execute 'gradlew run' first")`
	`208`	`+task verify(type:Exec) {`
`210`	`209`	`commandLine 'python', 'verify_output.py'`
	`210`	`+ doFirst {`
	`211`	`+ println("execute 'gradlew run' first")`
	`212`	`+ }`
`211`	`213`	`}`