Merge pull request #1562 from franklx/2.x

use System.lineSeparator()

Author: jknack

modules/jooby-apt/src/test/java/io/jooby/apt/MvcModuleCompilerRunner.java

@@ -69,7 +69,7 @@ private MvcModuleCompilerRunner module(boolean debug, SneakyThrows.Consumer<Joob
           add(c.getName() + "$Module");
         }
       }};
-    assertEquals(String.join("\n", clsLst), new String(Files.readAllBytes(services), StandardCharsets.UTF_8).trim());
+    assertEquals(String.join(System.lineSeparator(), clsLst), new String(Files.readAllBytes(services), StandardCharsets.UTF_8).trim());
 
     consumer.accept(application);
     return this;