Add blank line after every result in grep

Question

my grep command looks like this zgrep -B bb -A aa \"pattern\" *

I would lke to have output as:

file1:line1
file1:line2
file1:line3
file1:pattern
file         


        

Answer 1

pipe grep output through

awk -F: '{if(f!=$1)print ""; f=$1; print $0;}'