Bug fix : variable capture in ltac code of Nsatz
Bug fix : variable capture in ltac code of Nsatz

changing
set (x := val)
into
let x := fresh "x" in
set (x := val)

Lionel-Rieg/coq,coq/coq,JasonGross/coq,coq/coq,maximedenes/coq,gares/coq,coq/coq,SkySkimmer/coq,silene/coq,coq/coq,letouzey/coq-wip,maximedenes/coq,letouzey/coq-wip,Matafou/coq,Matafou/coq,SkySkimmer/coq,ppedrot/coq,amintimany/coq,ejgallego/coq,letouzey/coq-wip,JasonGross/coq,william-lawvere/coq,maximedenes/coq,ejgallego/coq,amintimany/coq,Zimmi48/coq,ejgallego/coq,gares/coq,letouzey/coq-wip,Ptival/coq,Zimmi48/coq,Lionel-Rieg/coq,maximedenes/coq,Zimmi48/coq,ppedrot/coq,SkySkimmer/coq,JasonGross/coq,gares/coq,JasonGross/coq,gares/coq,letouzey/coq-wip,william-lawvere/coq,Lionel-Rieg/coq,ppedrot/coq,ejgallego/coq,silene/coq,ppedrot/coq,maximedenes/coq,SkySkimmer/coq,amintimany/coq,silene/coq,Ptival/coq,Ptival/coq,ppedrot/coq,Matafou/coq,Zimmi48/coq,gares/coq,william-lawvere/coq