GFM Live Preview
This page provides a live GFM preview, rendered client-side using javascript. The majority of the credit goes to the wonderful Showdown script, which handles the meat of the processing. GFM modifications for newlines, underscore-words, autolinking and GitHub SHA1/issue link syntaxes were added.
GitHub now has previews on all inputs that use GFM. This live preview should be considered deprecated. It may not render exactly the same way github.com will due to differences in markdown libraries.
