Backporting part of r12970 to trunk (deprecation of double induction). Backport of the part of r12970 about Fixpoint doc will come in a further commit.
Backporting part of r12970 to trunk (deprecation of double induction).
Backport of the part of r12970 about Fixpoint doc will come in a further commit.

git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@13081 85f007b7-540e-0410-9357-904b9bb8a0f7

maximedenes/coq,Zimmi48/coq,ale-f/coq,herbelin/coq-hh,barras/coq,jhjourdan/coq,william-lawvere/coq,barras/coq,pirbo/coq,letouzey/coq-wip,aspiwack/coq,Matafou/coq,coq/coq,Zimmi48/coq,gmalecha/coq,pirbo/coq,tomprince/coq,SkySkimmer/coq,mlasson/coq,silene/coq,ale-f/coq,Ptival/coq,jpdeplaix/coq,mattam82/coq,asr/coq,jhjourdan/coq,letouzey/coq-wip,ejgallego/coq,shindere/coq,herbelin/coq-hh,herbelin/github-coq,mattam82/Coq-misc,jhjourdan/coq,amintimany/coq,Lionel-Rieg/coq,8l/coq,Ptival/coq,Matafou/coq,tomprince/coq,coq/coq,Lionel-Rieg/coq,TheTypoMaster/coq,Zimmi48/coq,TheTypoMaster/coq,ppedrot/coq,mattam82/Coq-misc,shindere/coq,JasonGross/coq,8l/coq,letouzey/coq-wip,gmalecha/coq,pirapira/coq2rust,maximedenes/coq,ejgallego/coq,TheTypoMaster/coq,SkySkimmer/coq,coq/coq,asr/coq,pirapira/coq2rust,ale-f/coq,SkySkimmer/coq,maximedenes/coq,mattam82/coq,TOSPIO/coq,maximedenes/coq,herbelin/github-coq,Zimmi48/coq,gares/coq,ejgallego/coq,Matafou/coq,shindere/coq,tomprince/coq,coq/coq,mlasson/coq,JasonGross/coq,silene/coq,ejgallego/coq,barras/coq,william-lawvere/coq,aspiwack/coq,JasonGross/coq,asr/coq,silene/coq,letouzey/coq-wip,TOSPIO/coq,TOSPIO/coq,jpdeplaix/coq,Lionel-Rieg/coq,Ptival/coq,8l/coq,gares/coq,aspiwack/coq,ppedrot/coq,gares/coq,pirapira/coq2rust,ppedrot/coq,mattam82/coq,gares/coq,ppedrot/coq,gares/coq,maximedenes/coq,amintimany/coq,amintimany/coq,gmalecha/coq,herbelin/github-coq,jpdeplaix/coq,mlasson/coq,JasonGross/coq,letouzey/coq-wip,SkySkimmer/coq,pirbo/coq,ppedrot/coq,william-lawvere/coq