[toplevel] Print error header on fatal batch error.
[toplevel] Print error header on fatal batch error.

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