Description:
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The imagettfbbox / imagettftext should return an array with the boundaries on texts. This works fine with a single string, but if you use a multiline string (with \n in it) it fails to report the actual size, and returns the size / box of a single line.

The string _is_ writen normally on the image, ie; with a newline instead of an \n, but the sizes are wrong.

Reproduce code:
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// string with a line break, try imagettftext, it'll put the correct string on the image, but return the wrong results
$bounds = imagettfbbox(8, 0, 'tahoma.ttf', 'j\nj');
print_r($bounds);

// no line break here, just a \ instead of a /, which is the same size.
$bounds = imagettfbbox(8, 0, 'tahoma.ttf', 'j/nj');
print_r($bounds);

Expected result:
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The first line should return something like a box with an x/y of 3 / 26 (or close), the second result should return (and does ;)) an x/y box of 15 / 12.


Actual result:
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Both will give the same result, a box of x: 15 y: 26.