unfurl not support parsing the ext

[0ktavandi]

unfurl not support parsing the extension mode
if any url like this example.com/asdasda.jpg

how unfurl extract the extension in unfurl mode?
so the expected output will be
echo example.com/crot.jpg | unfurl extension

jpg

[tomnomnom]

Good idea!

I've implemented this as a format specifier so you can do:

> echo example.com/crot.jpg | unfurl format %e
jpg

This is available from v0.3.1

If it seems to be popular I'll add an extension alias to make it easier. Thanks!