E.g.
highlighting.c:950:3: error: the address of
'highlighting_styles_ADA' will always evaluate as 'true'
Note: This commit also contains some trailing whitespace removal.
This changes these three filetypes to "normal" ones rather than HTML
and PHP being hard-coded together with XML. Now the definitions
simply references each other and the filetypes.* files simply inherits
styling and keywords from the appropriate filetype.
This also makes these filetypes have their own Python styles like they
had their own JavaScript ones, rather than trickily reference the
Python ones.
