[Rd] na.exclude.default returns class "omit" (PR#6420)

[Roger.Bivand at nhh.no]

Sorry to be difficult, but in devel: stat/R/nafns.R line 32
na.omit.default is now class "exclude" and na.exclude.default line 86 is
still class "omit"! I know I need new glasses, don't I?

Roger

PS. na.*.data.frame() seem consistent!

-- 
Roger Bivand
Econonic Geography Section, Department of Economics, Norwegian School of 
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, 
Norway, voice: +47-55959355, fax: +47-55959393; Roger.Bivand at nhh.no