WARNING on R CMD check #74

* checking data for non-ASCII characters ... WARNING
  Warning: found non-ASCII string
  'PROJCRS["NTF (Paris) / Lambert zone II",
      BASEGEOGCRS["NTF (Paris)",
          DATUM["Nouvelle Triangulation Francaise (Paris)",
              ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
                  LENGTHUNIT["metre",1]]],
          PRIMEM["Paris",2.5969213,
              ANGLEUNIT["grad",0.0157079632679489]],
          ID["EPSG",4807]],
      CONVERSION["Lambert zone II",
          METHOD["Lambert Conic Conformal (1SP)",
              ID["EPSG",9801]],
          PARAMETER["Latitude of natural origin",52,
              ANGLEUNIT["grad",0.0157079632679489],
              ID["EPSG",8801]],
          PARAMETER["Longitude of natural origin",0,
              ANGLEUNIT["grad",0.0157079632679489],
              ID["EPSG",8802]],
          PARAMETER["Scale factor at natural origin",0.99987742,
              SCALEUNIT["unity",1],
              ID["EPSG",8805]],
          PARAMETER["False easting",600000,
              LENGTHUNIT["metre",1],
              ID["EPSG",8806]],
          PARAMETER["False northing",2200000,
              LENGTHUNIT["metre",1],
              ID["EPSG",8807]]],
      CS[Cartesian,2],
          AXIS["easting (X)",east,
              ORDER[1],
              LENGTHUNIT["metre",1]],
          AXIS["northing (Y)",north,
              ORDER[2],
              LENGTHUNIT["metre",1]],
      USAGE[
          SCOPE["Engineering survey, topographic mapping."],
          AREA["France mainland onshore between 50.5 grads and 53.5 grads North (45<c2><b0>27'N to 48<c2><b0>09'N). Also used over all onshore mainland France."],
          BBOX[42.33,-4.87,51.14,8.23]],
      ID["EPSG",27572]]' in object 'guerry'
* checking LazyData ... OK
* checking data for ASCII and uncompressed saves ... WARNING

  Note: significantly better compression could be obtained
        by using R CMD build --resave-data
                           old_size new_size compress
  guerry.rda                  324Kb    229Kb       xz
  ny_trees.rda                135Kb    112Kb       xz
  worldclim_simulation.rda    262Kb    223Kb       xz