correct commandLine for davis task

build.gradle

@@ -20,7 +20,7 @@ task installJBotsim(type: Copy, group: "distribution", description: "Install jbo
 // Basic task to launch davis with appropriate arguments :
 // <network> <id> <size> <algo>
 task davis(type: Exec, group: "Application", description: "Run default Davis") {
-    commandLine 'davis/bin/udavis','src/RingAnon2AgentsSym.java','RandomIds','18','src/randomWalkRing.java'
+    commandLine 'davis/bin/udavis','src/RingAnon2AgentsSym.java','RandomIds','18','src/RandomWalkRing.java'
     dependsOn installJBotsim
 }