modify layout
sed -i -e 's/字節/ byte /g' coroutines_in_c.tex
sed -i -e 's/調用/呼叫/g' coroutines_in_c.tex
sed -i -e 's/代碼/程式碼/g' coroutines_in_c.tex
remove useless word
sed -i -e 's/進程/行程/g' coroutines_in_c.tex
sed -i -e 's/線程/ thread /g' coroutines_in_c.tex
sed -i -e 's/堆棧/堆疊/g' coroutines_in_c.tex