Add a missing trailing 'e' to the encoding of maps

bencode/bencode.go

@@ -83,6 +83,7 @@ func marshal(w io.Writer, data interface{}) error {
 				return err
 			}
 		}
+		fmt.Fprintf(w, "e")
 
 	case []string:
 		fmt.Fprintf(w, "l")

bencode/bencode_test.go

@@ -25,13 +25,7 @@ var tests = []struct {
 	{[]string{"one", "two"}, "l3:one3:twoe"},
 	{[]string{}, "le"},
 
-	{
-		map[string]interface{}{
-			"one": "aa",
-			"two": "bb",
-		},
-		"d3:one2:aa3:two2:bbe",
-	},
+	{map[string]interface{}{"one": "aa", "two": "bb"}, "d3:one2:aa3:two2:bbe"},
 	{map[string]interface{}{}, "de"},
 }