tpl/internal: Sync go_templates

Closes #10411

tpl/internal/go_templates/texttemplate/helper.go

@@ -19,6 +19,7 @@ import (
 // Must is a helper that wraps a call to a function returning (*Template, error)
 // and panics if the error is non-nil. It is intended for use in variable
 // initializations such as
+//
 //	var t = template.Must(template.New("name").Parse("text"))
 func Must(t *Template, err error) *Template {
 	if err != nil {