Fix order of let-in representation comment.
Fix order of let-in representation comment.

The comment had the type and value of the let-in swapped, which contradicted the listed types.
maximedenes/coq,SkySkimmer/coq,ejgallego/coq,coq/coq,ppedrot/coq,silene/coq,Matafou/coq,gares/coq,maximedenes/coq,coq/coq,JasonGross/coq,gares/coq,maximedenes/coq,coq/coq,ejgallego/coq,Zimmi48/coq,Zimmi48/coq,Zimmi48/coq,letouzey/coq-wip,maximedenes/coq,ppedrot/coq,ppedrot/coq,ppedrot/coq,gares/coq,ejgallego/coq,letouzey/coq-wip,Matafou/coq,ejgallego/coq,silene/coq,letouzey/coq-wip,Matafou/coq,SkySkimmer/coq,coq/coq,silene/coq,JasonGross/coq,JasonGross/coq,maximedenes/coq,ppedrot/coq,JasonGross/coq,letouzey/coq-wip,letouzey/coq-wip,SkySkimmer/coq,Zimmi48/coq,gares/coq,gares/coq,SkySkimmer/coq