Add target=_blank to attribution and move copyright sign back into link

osm2vectortiles.tm2source/data.yml

@@ -4,7 +4,7 @@ _prefs:
   mapid: ''
   rev: ''
   saveCenter: true
-attribution: '&copy; <a href="http://www.openstreetmap.org/about/">OpenStreetMap contributors</a>'
+attribution: '<a href="http://www.openstreetmap.org/about/" target="_blank">&copy; OpenStreetMap contributors</a>'
 center: 
   - 8.5388
   - 47.3434

src/create-extracts/create-extracts.sh

@@ -113,7 +113,7 @@ function update_metadata() {
     local extract_center="$3"
     local min_zoom="$4"
     local max_zoom="$5"
-    local attribution='&copy; <a href="http://www.openstreetmap.org/about/">OpenStreetMap contributors</a>'
+    local attribution='<a href="http://www.openstreetmap.org/about/" target="_blank">&copy; OpenStreetMap contributors</a>'
     local filesize="$(wc -c $extract_file)"
 
     insert_metadata_entry "$extract_file" "type" "baselayer"