updated "op +", "op -", "op *". "HOL.divide" in src & test

find . -type f -exec sed -i s/"\"op +\""/"\"Groups.plus_class.plus\""/g {} \;
find . -type f -exec sed -i s/"\"op -\""/"\"Groups.minus_class.minus\""/g {} \;
find . -type f -exec sed -i s/"\"op *\""/"\"Groups.times_class.times\""/g {} \;
find . -type f -exec sed -i s/"\"HOL.divide\""/"\"Rings.inverse_class.divide\""/g {} \;

 s/\\([a-zA-Z]+)\s*/$1/g;

 s/\$//g;

 s/^BOOKMARK/\\BOOKMARK/g;