How to Turn separate lines into a comma separated list with quoted entries in Bash script

 I have the following data :

heatmap
data
ggplot2
html
tools




#!/bin/bash

input=( $(cat ~/root/list.txt) )

output=( $(

for i in ${input[@]}

do

echo -ne "'$i',"

done

) )

output=${output:0:-1}

echo ${output//,/, }







Output:

'heatmap', 'data', 'ggplot2', 'html', 'tools'