Perl - Insert lines after a match is found in a file

Question

I have a file with the following syntax in some_1.xyz

module some_1 {
INPUT PINS
OUTPUT PINS
}

and I want to insert APPLY DELAYS xx and APPLY L

Answer 1

Something much simpler, in just one line using SED (in case this question is for UNIX only and when the match is a fixed value, not regular expression):

sed -i -e "s//\n/g" file.txt

(The options have been swapped compared to the initial response, because the first comment.)

Notice the \n is to add a new line. Regards