Protect printing of ltac's "context [...]" from possible collision with user-level notations by inserting spaces.
Protect printing of ltac's "context [...]" from possible collision
with user-level notations by inserting spaces.

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