chore: go mod tidy / vendor / make deps

vendor/github.com/prometheus/common/expfmt/encode.go

@@ -18,14 +18,12 @@ import (
 	"io"
 	"net/http"
 
+	"github.com/munnerz/goautoneg"
+	dto "github.com/prometheus/client_model/go"
 	"google.golang.org/protobuf/encoding/protodelim"
 	"google.golang.org/protobuf/encoding/prototext"
 
 	"github.com/prometheus/common/model"
-
-	"github.com/munnerz/goautoneg"
-
-	dto "github.com/prometheus/client_model/go"
 )
 
 // Encoder types encode metric families into an underlying wire protocol.
@@ -61,7 +59,7 @@ func (ec encoderCloser) Close() error {
 // appropriate accepted type is found, FmtText is returned (which is the
 // Prometheus text format). This function will never negotiate FmtOpenMetrics,
 // as the support is still experimental. To include the option to negotiate
-// FmtOpenMetrics, use NegotiateOpenMetrics.
+// FmtOpenMetrics, use NegotiateIncludingOpenMetrics.
 func Negotiate(h http.Header) Format {
 	escapingScheme := Format(fmt.Sprintf("; escaping=%s", Format(model.NameEscapingScheme.String())))
 	for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
@@ -153,7 +151,7 @@ func NewEncoder(w io.Writer, format Format, options ...EncoderOption) Encoder {
 	case TypeProtoDelim:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := protodelim.MarshalTo(w, v)
+				_, err := protodelim.MarshalTo(w, model.EscapeMetricFamily(v, escapingScheme))
 				return err
 			},
 			close: func() error { return nil },