Enable fragile pattern warning in cclosure
Enable fragile pattern warning in cclosure

This file is already mostly in the required style so I wanted to see
what it looks like.

For a couple matches I locally disabled the warning as it was too
annoying otherwise (`when` clauses are especially annoying).

There are a couple places where I think it clearly looks better (eg
assoc_defined at the beginning of the file) but overall I'm not all
that convinced.
What do other people think?

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