Eliminate accidental trigraphs
Eliminate accidental trigraphs

Those particular instances were harmless, but in general trigraphs can
cause unintended behaviour changes. Not having any trigraphs in the code
makes it easier to catch unintended ones via a simple regex.
(In GNU-C trigraphs are disabled by default, but enabled in ISO-C)

Akemi/libass,astiob/libass,libass/libass,ShiftMediaProject/libass,MrSmile/libass,Akemi/libass,xbmc/libass,libass/libass,ShiftMediaProject/libass,astiob/libass,MrSmile/libass,xbmc/libass,Akemi/libass