BASH: Sed Simple Literal Text Search & Replace (does not support new lines)

sed-simple.sh

function sed-keyword-escape {
    echo $1 | sed -e 's/[]\/$*.^|[]/\\&/g'
} 

function sed-replace-escape {
    echo $1 | sed -e 's/[\/&]/\\&/g'
}

function sed-easy {
    sed -i "s/$(sed-keyword-escape $1)/$(sed-replace-escape $2)/g" $3
}