Although this doesn't change anything in practice, it started to be a
nightmare trying to deal with compilers warnings about "missing"
initializers, which are generally good but not in that file.
Use a GCC pragma to disable -Wmissing-field-initializers in this file.
This works with both GCC and CLang, and should be harmless on other
compilers since unknown pragmas are supposed to be ignored.
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.
