Try to fix the xml things.

rest/dav/webdav.go

@@ -564,7 +564,9 @@ func (this *Handler) handlePropfind(writer http.ResponseWriter, request *http.Re
 		if info.IsDir() {
 			href += "/"
 		}
-		return multiStatusWriter.write(makePropstatResponse(href, propstats))
+
+		propstatResponse := makePropstatResponse(href, propstats)
+		return multiStatusWriter.write(propstatResponse)
 	}
 
 	walkErr := walkFS(ctx, this.FileSystem, depth, reqPath, fileInfo, walkFn)

rest/dav/xml_test.go

@@ -16,7 +16,7 @@ import (
 	"strings"
 	"testing"
 
-	ixml "golang.org/x/net/webdav/internal/xml"
+	ixml "tank/rest/dav/internal/xml"
 )
 
 func TestReadLockInfo(t *testing.T) {