Improve the Thanos documentation for Thanos v0.2

example.jsonnet

@@ -1,4 +1,5 @@
-local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') + {
+local kp =
+  (import 'kube-prometheus/kube-prometheus.libsonnet') + {
     _config+:: {
       namespace: 'monitoring',
     },