docs(Browser): more acurate 'retina' flag explanation #6203 (#6206)
docs(Browser): more acurate 'retina' flag explanation #6203 (#6206)

As per issue https://github.com/Leaflet/Leaflet/issues/6195#issuecomment-399510164
Leaflet/Leaflet,stefanocudini/Leaflet,CapeSepias/Leaflet,stefanocudini/Leaflet,stefanocudini/Leaflet,Leaflet/Leaflet,Leaflet/Leaflet,CapeSepias/Leaflet,CapeSepias/Leaflet