Changes in version 2.3.0 (2020-02-24)                  

Visible changes

    o   Correction of the help page for ivglm:
	h_i(psi)=\textrm{expit}\{\hat{E}(Y|L_i,Z_i,X_i)-m^T(L_i)psi
	X_i\} replaced by
	h_i(psi)=\textrm{expit}[\textrm{logit}\{\hat{E}(Y|L_i,Z_i,X_i)\}-m^T(L_i)psi
	X_i].

Non-visible changes

    o   Less internal calls to coxph.detail in stdCoxph, which makes
	the function slightly faster.

    o   Replaced class(fit)=="name" with inherits(x=fit, what="name")
	in places, which should be safer.

    o   Minor changes in the internal handling of formula arguments, to
	avoid errors if formulas are given implicitly to models, e.g. f
	<- y~x, fit <- glm(formula=f)