D:\>perl -pe "s/( +|\t\t+)$//g" test.html 4 spaces 1 space 2 tabs 1 tab D:\>perl -pe "" test.html 4 spaces 1 space 2 tabs 1 tab D:\>
D:\>perl -pe "s/( +|\t\t+)$//g" test.html 4 spaces 1 space 2 tabs 1 tab D:\>perl -pe "" test.html 4 spaces 1 space 2 tabs 1 tab D:\>