I did find some discrepancies:
ftsysmem.h doesn't put the function name on the the following line
for ft_memory_new and ft_memory_destroy,
This file, together with ftsysio.h, is obsolete; I've just removed
both.
cache/ftccmap.h uses a mixed format in FTC_CMapCache_New and
FTC_CMapCache_Lookup,
I've converted the whole file to the new comment style.
ftcache.h uses a mixed format in FTC_CMapCache_New and
FTC_CMapCache_Lookup,
Fixed.
fttrigon.h has a lot of mixed format function comments,
Converted the whole file.
freetype.h has a mixed format function commen for
FT_Stream_OpenGzip.
Well, this function isn't in freetype.h, but I've cleaned up all other
mix-ups of old with new style.