changelog entry for Ltac2 unify
changelog entry for Ltac2 unify

SkySkimmer/coq,ejgallego/coq,ejgallego/coq,coq/coq,JasonGross/coq,Zimmi48/coq,Zimmi48/coq,coq/coq,coq/coq,ejgallego/coq,JasonGross/coq,Zimmi48/coq,SkySkimmer/coq,SkySkimmer/coq,JasonGross/coq,coq/coq,SkySkimmer/coq,Zimmi48/coq,ejgallego/coq,JasonGross/coq