vimでvで選択して、pで貼付けが出来なくなっていたのを直した ref: http://qiita.com/mapyo/items/6926bd99e48e5b4581f5

file0.txt

$ vim --version                                         

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Nov 12 2014 07:32:18)
MacOS X (unix) version
Included patches: 1-488
Compiled by Homebrew

file1.txt

set clipboard=unnamed,autoselect

file2.txt

set clipboard=unnamed