git diff no color but special characters

Change env LESS
See http://goo.gl/gXrNcT

turn off mailapp automatic attachment preview on mac

http://www.cultofmac.com/218527/turn-off-mailapp-automatic-attachment-preview-os-x-tips/

$ defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes

[note, do not use sudo]