[Rd] optim warning message. (PR#8186)

[KKIII@Indiana.Edu]

Full_Name: Ken Kelley
Version: 2.1.1
OS: Windows XP
Submission from: (NULL) (156.56.79.54)



A warning from optim() when reltol was specified for the L-BFGS-B method:


"method L-BFGS-B uses 'fact' (and 'pgtol') instead of 'reltol' and 'abstol' in:
optim(par = LL.0, fn = Low.Lim.NC.F, gr = NULL, method = c("Nelder-Mead","

But, "fact" should be "factr," which is the name of the control parameter or
interest.