runTask: Add =

vars/runTask.groovy

@@ -57,7 +57,7 @@ def call(String task, String branch, String repo, String phpversion, String data
                         ).trim()
                         runner = "${env.PATHTORUNNER}/${moodleversion}"
                         if (!fileExists(runner)) {
-                            runner  "${env.PATHTORUNNER}/master"
+                            runner = "${env.PATHTORUNNER}/master"
                         }
                     }
                 }