if [ -n "$BASH_VERSION" -o -n "$KSH_VERSION" -o -n "$ZSH_VERSION" ]; then
[ -x /usr/bin/id ] || return
#[ `/usr/bin/id -u` -le 100 ] && return
# for bash and zsh, only if no alias is already set
alias vi >/dev/null 2>&1 || alias vi=vim
fi
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