Why was the "All PHP files MUST end with a single blank line" rule introduced in PSR?

Question

PHP

Interested in the reasons for adding the All PHP files MUST end with a single blank line rule to the PSR recommendations.

Answer 1

Let's take the same cat command. ;)

Answer 2

Briefly - historically/standards. Longer here, for example - unix.stackexchange.com/questions/18743/whats-the-p...