[Cosmetics] Cleanup trailing spaces

doc/mainpage.h

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncAppCfg.cpp

source/App/Parcat/parcat.cpp

source/Lib/CommonLib/Buffer.cpp

source/Lib/CommonLib/CodingStructure.cpp

source/Lib/CommonLib/CommonDef.h

source/Lib/CommonLib/Contexts.cpp

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/InterPrediction.h

source/Lib/CommonLib/InterpolationFilter.cpp

source/Lib/CommonLib/IntraPrediction.h

source/Lib/CommonLib/LoopFilter.cpp

source/Lib/CommonLib/LoopFilter.h

source/Lib/CommonLib/Mv.h

source/Lib/CommonLib/RdCost.cpp

source/Lib/CommonLib/Reshape.h

source/Lib/CommonLib/Rom.cpp

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/Slice.h