this should have emphasis this_should_not _nor_should_this
a non-markdown link: http://github.com/blog this one is a markdown link Email test: support@github.com
c4149e7bac80fcd1295060125670e78d3f15bf2e tekkub@c4149e7bac80fcd1295060125670e78d3f15bf2e mojombo/god@c4149e7bac80fcd1295060125670e78d3f15bf2e
issue #1 tekkub#1 mojombo/god#1