SIO struct assignment using set internal

SIO not accepting whitespace around equals sign in property assignments
You do not want to know how much time it took me to finally figure out why some structured properties (SIOs) showed up in queries and some did not! Sigh :)

Below an obvious bug in parsing struct calls to #set_internal, at least, it behaves totally different from any other parser hooks I have encountered in MediaWiki thus far in that whitespace is apparently not ignored around parameters and operators. As far as I can tell, this is not in the documentation whereas I prefer the spaced call better for readability.

Tight struct
Call to #set_internal done for a struct that does not use whitespace around the equal signs in property assignments:

done.

Spaced struct
Call to #set_internal done for a struct that does use whitespace, like this:

done.

Tight struct
Call to #ask querying for tight structure members, like this, renders a SIO with named attributes

Calling here ...

done.

Spaced struct
Call to #ask querying for spaced structure members, like this, renders a numbered SIO but no named attributes

Calling here ...

done.