Fix redirection to stderr in lint-repository error message.
Fix redirection to stderr in lint-repository error message.

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