Avoid unreadable character in TODO comment

if exist unreadable character in one TODO comment, then all other TODO
comment are lost, the file NSData+Split.h/m file copy from
“https://github.com/bsmt/Krush/tree/master/Krush”
forget to commit a file
Make selection stable while highlighting TODO item
Merge pull request #26 from shuice/master

Modify two issues