Description:
------------
yaml_emit will limit the number of decimals to 6, a that is the default precision for snprintf used by the module to convert the double to a string.

I would expect the resulting yaml to contain the exact same number as "echo" would print.



Test script:
---------------
<?php

$i = 0.123456789;

echo $i;
// 0.123456789

echo yaml_emit($i);
// --- 0.123457
// ...


Expected result:
----------------
0.123456789
--- 0.123456789
...


Actual result:
--------------
0.123456789
--- 0.123457
...