readme
remove $ from s:block
+call operator#user#define('furround-delete', 'operator#furround#delete')
remove s:log()
use v:count1 but not worked
+function! s:normal(s)
renamed:    t/furround.vim -> t/append.vim
add t/delete.vim
fixed bug in operator#furround#delete(motion) " {{{
update t/delete.vim