This may be illustrative:
https://stackoverflow.com/questions/12230290/vim-errors-on-vim-startup-when-run-in-fish-shell
I have in my ~/.vimrc: set shell=sh
On Tue, Feb 10, 2015 at 11:25 AM, Greg Reagle <greg.rea...@umbc.edu> wrote:
> On Mon, Feb 9, 2015, at 11:17 PM, Luciano ES wrote:
> > There is this command I like to run a lot:
> >
> > :r! sed '/pattern/\!d' /home/luc/db/info.txt
> >
> > It used to work fine, but now I get this error:
> >
> > fish: Illegal command name "(sed '/pattern/\!d' /home/luc/db/info.txt)"
> > Standard input: (sed '/pattern/\!d' /home/luc/db/info.txt) >
> > /tmp/v5pU4gh/0
> >
> > What does it mean? Why am I getting this?
>
> I think I've figured it out. Vim is enclosing the shell command in
> parentheses. In Bourne Shell the parentheses are a grouping construct
> that call a subshell. In fish the parentheses have a different
> incompatible meaning. Vim is depending on Bourne Shell semantics for
> the external shell. See my other post for how to work around.
>
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