Description:
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According to the documentation the changeability for short_open_tag is: 
PHP_INI_ALL

The changelog further mentions this:

    PHP_INI_ALL in PHP 4.0.0.
    PHP_INI_PERDIR in PHP < 5.3.0

There's no clear definition what happens when PHP >= 5.3, although according to 
this post it's definitely not PHP_INI_ALL:

http://stackoverflow.com/questions/5633301/cannot-turn-off-short-open-tag-with-
ini-set

Test script:
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N/A

Expected result:
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N/A

Actual result:
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N/A