This is a known bug in fish 2.1.x that will be fixed in the next minor 
release.

https://github.com/fish-shell/fish-shell/issues/1459

David Adam
zanc...@ucc.gu.uwa.edu.au

On Thu, 13 Nov 2014, Santhosh T wrote:
> the command:
> 
> echo -
> 
> prints nothing
> 
> i tried following also:
> 
> echo "-"
> echo '-'
> 
> but following works:
> 
> echo -e "\x2D"
> 
> what is so special about symbol "-"
> 
> the documentation also doesn't say anything special case for minus symbol

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