Run go fmt

This patch is the result of running `go fmt ./...` with Go v1.16.15.

src/server/routes.go

@@ -340,7 +340,7 @@ func (s *Server) handleItemList(c *router.Context) {
 			items = items[:perPage]
 		}
 		c.JSON(http.StatusOK, map[string]interface{}{
-			"list": items,
+			"list":     items,
 			"has_more": hasMore,
 		})
 	} else if c.Req.Method == "PUT" {