do for events.
one more space character.
Merge pull request #4 from mattn/do-for-events

do for events.
combines them with "\n"
refactoring: a big lambda becomes a function
omg
fix += / -=.
Merge pull request #5 from mattn/fix-plus-equal-minus-equal

fix += / -=.
only for 1-digit numbers
trimming spaces.
add test.
should be markdown.
easy deploy. it's not automatic yet.
fix case-sensitive issue.
add test for case-sensitive.
regex fix