- CHANGES IN R 4.2.0:
  SIGNIFICANT USER-VISIBLE CHANGES:
    * The formula method of aggregate() now matches the generic in
      naming its first argument x (resolving PR#18299 by Thomas
      Soeiro).
      This means that calling aggregate() with a formula as a named
      first argument requires name formula in earlier versions of R and
      name x now, so portable code should not name the argument (code
      in many packages did).
    * Calling && or || with either argument of length greater than one
      now gives a warning (which it is intended will become an error).
    * Calling if() or while() with a condition of length greater than
      one gives an error rather than a warning.  Consequently,
      environment variable _R_CHECK_LENGTH_1_CONDITION_ no longer has
      any effect.
    * Windows users should consult the WINDOWS section below for some
      profound changes including
        * Support for 32-bit builds has been dropped.
        * UTF-8 locales are used where available.
        * The default locations for the R installation and personal
          library folder have been changed.
      Thanks to Tomas Kalibera for months of work on the Windows port
      for this release.
  NEW FEATURES:
    * matrix(x, n, m) now warns in more cases where length(x) differs
      from n * m, as suggested by Abby Spurdle and Wolfgang Huber in
      Feb 2021 on the R-devel mailing list.
      This warning can be turned into an error by setting environment
      variable _R_CHECK_MATRIX_DATA_ to TRUE: R CMD check --as-cran
      does so unless it is already set.

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