Often when diffing two files I know there are going to be a lot of differences, and I just want some examples. Instead of waiting for icdiff to run on a whole file, I used to run something like:

$ icdiff <(head -n 20 a.txt) <(head -n 20 b.txt)

This works fine, but is annyoying to type. To fix this, I added a --head option to icdiff:

$ icdiff --head 20 a.txt b.txt

Get it on github: icdiff