diff --git a/report/report.tmpl b/report/report.tmpl
index be7afd0..af033c7 100644
--- a/report/report.tmpl
+++ b/report/report.tmpl
@@ -6,6 +6,10 @@
 % This file is a part of the math-optim project.
 % project homepage: https://git.dotya.ml/wanderer/math-optim/
 
-{{- .ReportBase -}}
+% begin report.tmpl
+
+{{ .ReportBase -}}
+
+% end report.tmpl
 
 % vim: ft=gotexttmpl ts=2 bs=2 expandtab