Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘François Rousset <francois.rousset@umontpellier.fr>’
  
  Found the following (possibly) invalid URLs:
    URL: https://stats.stackexchange.com/questions/13314/is-r2-useful-or-dangerous
      From: man/R2.Rd
      Status: 403
      Message: Forbidden

No changes to worse in reverse depends.