Revert "Fixing a De Bruijn bug in computing return predicate by inversion."
Revert "Fixing a De Bruijn bug in computing return predicate by inversion."

This reverts commit 94e9e28ebaa33e11164ca07f225d998ca7f8e52c.

Ptival/coq,Matafou/coq,amintimany/coq,coq/coq,ppedrot/coq,letouzey/coq-wip,Matafou/coq,mattam82/coq,Ptival/coq,Zimmi48/coq,gares/coq,ppedrot/coq,maximedenes/coq,letouzey/coq-wip,SkySkimmer/coq,ejgallego/coq,amintimany/coq,maximedenes/coq,Zimmi48/coq,letouzey/coq-wip,ppedrot/coq,JasonGross/coq,mattam82/coq,Lionel-Rieg/coq,mattam82/coq,Zimmi48/coq,Lionel-Rieg/coq,ejgallego/coq,JasonGross/coq,maximedenes/coq,silene/coq,william-lawvere/coq,coq/coq,gares/coq,ejgallego/coq,gares/coq,ppedrot/coq,gares/coq,gares/coq,ejgallego/coq,Lionel-Rieg/coq,JasonGross/coq,coq/coq,letouzey/coq-wip,SkySkimmer/coq,Zimmi48/coq,letouzey/coq-wip,coq/coq,JasonGross/coq,Ptival/coq,silene/coq,Matafou/coq,maximedenes/coq,SkySkimmer/coq,william-lawvere/coq,william-lawvere/coq,SkySkimmer/coq,ppedrot/coq,silene/coq,maximedenes/coq,amintimany/coq