symfonyAppPipeline: fix hook stages

vars/hook.groovy

@@ -7,9 +7,9 @@ def call(String name) {
         return
     }
     def hook = load(filepath)
-    if(hook.metaClass.respondsTo(hook, 'exec')) {
+    if (hook.metaClass.respondsTo(hook, 'exec')) {
         hook.exec()
     } else {
         error("Hook script '${filepath}' exists but does not expose an exec() function.")
     }
-}
+}