fixed multiple slashes in path

sitemap.go

@@ -4,6 +4,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"math"
+	"path"
 )
 
 type ChangeFrequency string
@@ -51,7 +52,7 @@ type SiteMap struct {
 
 func (m *SiteMap) AddURL(url string, lastMod *string, freq *ChangeFrequency, prio *float64) {
 	m.urls = append(m.urls, &urlXML{
-		Loc:        fmt.Sprintf("https://%s/%s", m.BaseURL, url),
+		Loc:        fmt.Sprintf("https://%s", path.Join(m.BaseURL, url)),
 		LastMod:    lastMod,
 		ChangeFreq: freq,
 		Priority:   prio,