skip save dialog on quit if buffer is shared

internal/action/actions.go

@@ -1900,6 +1900,20 @@ func (h *BufPane) Quit() bool {
 				h.ForceQuit()
 			})
 		} else {
+			copies := 0
+			for _, t := range Tabs.List {
+				for _, p := range t.Panes {
+					h2, ok := p.(*BufPane)
+					if ok && h.Buf.SharedBuffer == h2.Buf.SharedBuffer {
+						copies = copies+1
+					}
+				}
+			}
+			if copies > 1 {
+				h.ForceQuit()
+				return true
+			}
+
 			InfoBar.YNPrompt("Save changes to "+h.Buf.GetName()+" before closing? (y,n,esc)", func(yes, canceled bool) {
 				if !canceled && !yes {
 					h.ForceQuit()