* Handle-error-first approach for consistent function body
termination at the root with the main intend, and less indention.
* __DIR__ instead of dirname( __FILE__ )
* Single quotes.
* Correct pickHost documentation: wgMathMathMLUrl is not an array,
and is not used in this method, that's at a different level
of abstraction (via the constructor).
* White spacing.
* require_once is not a function.
Change-Id: Id4bec8415893245e2569a39ab5406a0820238ae4
83da0338ec