we can't print null when null is returned.. - we check for isset() above this so it's a no-op - even doing correctly we would get e.g.   php> echo 'hi'   hinull
we can't print null when null is returned..
- we check for isset() above this so it's a no-op
- even doing correctly we would get e.g.
  php> echo 'hi'
  hinull

Reviewed By: eric

Test Plan:
php> echo 'hi'
hi
php> =null

php>

Revert Plan: Ok

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