====== SED - File Spacing - Undo double-spacing a file ======

Assumes even-numbered lines are always blank.


<code bash>
sed 'n;d' filename
</code>

----

===== Example =====

Running that command again this file:

<file bash testfile>
aaa

bbb

ccc

</file>

returns:

<file bash testfile>
aaa
bbb
ccc
</file>