try to fix encoder config
diff --git a/heka/files/encoder/es-json.toml b/heka/files/encoder/es-json.toml
index 2401198..5896903 100644
--- a/heka/files/encoder/es-json.toml
+++ b/heka/files/encoder/es-json.toml
@@ -6,4 +6,5 @@
 es_index_from_timestamp = true
 {%- else -%}
 es_index_from_timestamp = false
+{%- endif -%}