Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Pedro J. Aphalo <pedro.aphalo@helsinki.fi>’
  
  Found the following (possibly) invalid URLs:
    URL: https://stackoverflow.com/questions/12318120/adding-table-within-the-plotting-region-of-a-ggplot-in-r
      From: man/geom_table.Rd
      Status: 403
      Message: Forbidden
    URL: https://stackoverflow.com/questions/25554548/adding-sub-tables-on-each-panel-of-a-facet-ggplot-in-r?
      From: man/geom_table.Rd
      Status: 403
      Message: Forbidden
    URL: https://stackoverflow.com/questions/51412522
      From: man/stat_apply.Rd
      Status: 403
      Message: Forbidden

No changes to worse in reverse depends.