Re: [PATCH 2/3] vimdiff: add tool documentation

David Aguilar [off-list ref] writes:

    (diff_mode && ... || merge_cmd_help ...) |
    while IFS= read -r line
    do
       ...
    done

How come we have to unset IFS here?

We are taking the input into a single variable "line", so what are
we splitting with IFS anyway?

In any case, thanks for spotting bash-isms to avoid.  We started
allowing "local", I think, at least in the tests, but otherwise many
bash-only things like "<(process)" redirection and "${substring:4}"
substitution are simply no-no.