Implemented a missing formatter method for WrappedInsertError

sql/errors.go

@@ -16,6 +16,7 @@ package sql
 
 import (
 	"fmt"
+	"io"
 	"strings"
 
 	"github.com/dolthub/vitess/go/mysql"
@@ -1068,6 +1069,15 @@ func (w WrappedInsertError) Error() string {
 	return w.Cause.Error()
 }
 
+// Format implements fmt.Formatter
+func (w WrappedInsertError) Format(s fmt.State, verb rune) {
+	if fmtErr, ok := w.Cause.(fmt.Formatter); ok {
+		fmtErr.Format(s, verb)
+		return
+	}
+	_, _ = io.WriteString(s, w.Error())
+}
+
 // IgnorableError is used propagate information about an error that needs to be ignored and does not interfere with
 // any update accumulators
 type IgnorableError struct {