SEBA-513 Cleanup errors reported by xproto validator

Change-Id: I081534669a8b2ff542dfe9548847f5ff40a47643
diff --git a/lib/xos-genx/xosgenx/jinja2_extensions/tosca.py b/lib/xos-genx/xosgenx/jinja2_extensions/tosca.py
index b6ae85d..947be4f 100644
--- a/lib/xos-genx/xosgenx/jinja2_extensions/tosca.py
+++ b/lib/xos-genx/xosgenx/jinja2_extensions/tosca.py
@@ -19,7 +19,8 @@
 def xproto_tosca_required(null, blank, default=None, modifier=None):
     # `null` is not currently considered. `blank` is deprecated.
     if (modifier == "optional") or (blank == "True") or (default is not None):
-         return "false"
+        return "false"
+
     return "true"