No known reason aside from bad copy pasta

Including the 'flattening' of arrays and objects used as page arguments
(really just the reducing to whether it is an array or object.

This is more proper and as chx pointed out illustrates that machine and human
names can differ.

This is more proper and as chx pointed out illustrates that machine and human
names can differ.

This way, it cannot overwrite existing variables.

The double-underscore suggestions allow this to be overridden by either
THEME_container__xray() or THEME_container__xray__form().

Minor code cleanup and much better inline documentation of the Oxford comma (human-readable listing) function.

Also, better text explaining why the  variable with menu_get_item info is not added to the help returned for the help page.

Everything is more consistent, with xray_SECTION_summary() and theme_xray_SECTION_summary(), the Xray reports overview page that re-uses the help section headers is a more proper renderable array, and both help and reports use the same data-gathering and same theming functions.

An attribute passed in gives reports page summary paragraphs a different class than the ones output as help on the section pages.

Note that before a theming function was not even used.