diff --git a/lib/querytracer/tracer.go b/lib/querytracer/tracer.go
index 8b4d228c9..3b4595c2e 100644
--- a/lib/querytracer/tracer.go
+++ b/lib/querytracer/tracer.go
@@ -181,7 +181,7 @@ func (t *Tracer) String() string {
 // ToJSON returns JSON representation of t.
 //
 // ToJSON must be called when t methods aren't called by other goroutines.
-
+//
 // It is safe calling ToJSON() when child tracers aren't finished yet.
 // In this case they will contain the corresponding message.
 func (t *Tracer) ToJSON() string {