Shell Programming and Scripting

printf "String for indented paragraphs: "
read indent
printf "String for other paragraphs: "
read other
nawk  -v indent="$indent" -v other="$other" '$0~indent { gsub(/\n/, "\n\t\t"); print "\t\t"$0} $0~other' RS= FS="\n" ORS="\n\n" IGNORECASE=1 infile

$ cat infile
Please ensure any expense claims are made
promptly as the evaluation period is about to expire.
 
Reading the operating instructions is
vital to the correct operation of this equipment.
 
Workstation serial numbers must be sent to the
purchasing department before equipment is distributed.
 
$ find=correct
$ awk  -v look="$find" '/claims/ { gsub(/\n/, "\n\t\t"); print "\t\t"$0} $0~look' RS= FS="\n" ORS="\n\n" IGNORECASE=1 infile
                Please ensure any expense claims are made
                promptly as the evaluation period is about to expire.
 
Reading the operating instructions is
vital to the correct operation of this equipment.

date=$( date +%d%m%y$h%m%s ) 
newfilename="testfile.$date" 
printf "enter filename: " 
read filename
printf "enter string: "
read string 
sed '/NZDT/{N;s/\n//;}' $filename >$newfilename
sleep 3
find=string
nawk -v look="$find" ' /OUT/ { gsub(/\n/, "\n\t\t"); print "\t\t"$0} $0~look' RS= FS="\n" ORS="\n\n" IGNORECASE=1 $newfilename