Squash not working due to trailing whitespace errors

From https://log.gitlap.com/goto/d082b5fdd2bab98b35d19e28d6e3216e, we see a number of failures due to ":N: trailing whitespace".

https://log.gitlap.com/goto/35b2376994e7ee4f63e550645734d3a5 also has other failures over the last 24 hours:

/cc: @felipe_artur, @smcgivern