Suggestion to improve tracing in nats-server through wrapping errors

Signed-off-by: Matthias Hanel <mh@synadia.com>

server/parser_test.go

@@ -15,6 +15,7 @@ package server
 
 import (
 	"bytes"
+	"errors"
 	"testing"
 )
 
@@ -582,7 +583,7 @@ func TestMaxControlLine(t *testing.T) {
 
 	pub := []byte("PUB foo.bar 11\r")
 	err := c.parse(pub)
-	if err != ErrMaxControlLine {
+	if !errors.Is(err, ErrMaxControlLine) {
 		t.Fatalf("Expected an error parsing longer than expected control line")
 	}
 }