IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
ma-is-empty-sub A,B:MsgA. ma-is-empty(A) AB
By:
RWO Thm*M:MsgA. ma-is-empty(M) M = MsgA 0 THEN HypSubst -1 0
THEN
BackThru Thm*M:MsgA. M
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
A,B:MsgA. ma-is-empty(A) 
A 
B
MsgA 0 THEN HypSubst -1 0
