Code cleaning in Obligations.
Code cleaning in Obligations.

This commit is chiefly about moving code around to ease readability.

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