IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
ma-outlinks-join-list2 1. MsgA List
2. u : MsgA
3. v : MsgA List
4. P:(IdLnkIdTypeProp), i:Id.
4. (Mv.(ltgma-outlinks(M;i).P(ltg))) (ltgma-outlinks((v);i).P(ltg))
P:(IdLnkIdTypeProp), i:Id.
(M[u / v].(ltgma-outlinks(M;i).P(ltg)))
(ltgma-outlinks(u(v);i).P(ltg))