backupskip for /private/tmp and ~/tmp

withouth this `crontab -e` was failing with
"temp file must be edited in place"

Author: vitaly

Changelog

@@ -2,6 +2,8 @@
   - golang syntax support (thanks @torkale)
   - josemarluedke/vim-rspec - lightweight Rspec runner for Vim
   - girblade/vim-gitgutter - it diff in the gutter (sign column) and stages/reverts hunks
+  - backupskip for /private/tmp and ~/tmp.
+    skip backups on OSX temp dir, for crontab -e to properly work
 
 * 2013-08-28
   - fix startup echo messages redirect

global.vim

@@ -79,6 +79,7 @@ call system('mkdir -vp ~/.backup/undo/ > /dev/null 2>&1')
 set backupdir=~/.backup,.       " list of directories for the backup file
 set directory=~/.backup,~/tmp,. " list of directory names for the swap file
 set nobackup            " do not write backup files
+set backupskip+=~/tmp/*,/private/tmp/* " skip backups on OSX temp dir, for crontab -e to properly work
 set noswapfile          " do not write .swp files
 set undofile
 set undodir=~/.backup/undo/,~/tmp,.