grep -En '==|\[\[|\[[0-9@]\]|=\(|\$\[|=~' script
80:    if [ ! "x$curl" == "x" ];then
118:    if [ $2 ] && [ "$status" == "0" ];then
156:if [ "x$url" == "x" -o "x$token" == "x" ]
162:if [[ `which curl` =~ "/curl" ]]
166:if [[ `which wget` =~ "/wget" ]]
171:if [[ ! $curl && ! $wget ]];
180:    if [ "$host" == "" ] || [ "$State" == "" ]; then
200:        arr=($line)
201:        if [ ${#arr[@]} != 0 ];then
202:            if [[ ${#arr[@]} < 3 ]] || [[ ${#arr[@]} > 4 ]];then
203:                echo "ERROR: STDIN must be either 3 or 4 fields long, I found "${#arr[@]}
205:                if [ ${#arr[@]} == 4 ]; then
207:                    <servicename>${arr[1]}</servicename>
208:                    <hostname>${arr[0]}</hostname>
209:                    <state>${arr[2]}</state>
210:                    <output>${arr[3]}</output>"
213:                    <hostname>${arr[0]}</hostname>
214:                    <state>${arr[1]}</state>
215:                    <output>${arr[2]}</output>"
219:                checkcount=$[checkcount+1]

printf "%s\n" "some line"

echo -e "string"

printf "string"

80:    if [ ! "x$curl" == "x" ];then                                                             # single =
118:    if [ $2 ] && [ "$status" == "0" ];then                                                   # single =
156:if [ "x$url" == "x" -o "x$token" == "x" ]                                                    # single =
162:if [[ `which curl` =~ "/curl" ]]                                                             # use case statement test for */curl* or use type statement instead of which
166:if [[ `which wget` =~ "/wget" ]]                                                             # use case statement test for */wget* or use type statement instead of which
171:if [[ ! $curl && ! $wget ]];                                                                 # if [ ! $curl ] && [ ! $wget ]
180:    if [ "$host" == "" ] || [ "$State" == "" ]; then                                         # single =
200:        arr=($line)                                                                          # set -- $line
201:        if [ ${#arr[@]} != 0 ];then                                                          # if [ $# != 0 ]; then
202:            if [[ ${#arr[@]} < 3 ]] || [[ ${#arr[@]} > 4 ]];then                             # if [ $# -lt 3 ] || [ $# -gt 4 ]
203:                echo "ERROR: STDIN must be either 3 or 4 fields long, I found "${#arr[@]}    # printf "%s\n" "ERROR ... I found $#"
205:                if [ ${#arr[@]} == 4 ]; then                                                 # if [ $# -eq 4 ]; then
207:                    <servicename>${arr[1]}</servicename>                                     # <servicename>${2}</servicename>
208:                    <hostname>${arr[0]}</hostname>                                           # <hostname>${1}</hostname>      
209:                    <state>${arr[2]}</state>                                                 # <state>${3}</state>
210:                    <output>${arr[3]}</output>"                                              # etc...
213:                    <hostname>${arr[0]}</hostname>
214:                    <state>${arr[1]}</state>
215:                    <output>${arr[2]}</output>"
219:                checkcount=$[checkcount+1]                                                   # checkcount=$((checkcount+1))