github-flavored-markdown

This has been fixed on github.com. I’m not sure when, but you can now escape square brackets with a single backlash. EG \[Hello\] is rendered as [Hello]

As you may noticed in Markdown Cheatsheet, GitHub does not show line numbers in code blocks.

You can use HTML tables on GitHub (but not on StackOverflow) <table> <tr> <td>One</td> <td>Two</td> </tr> <tr> <td colspan=”2″>Three</td> </tr> </table> Becomes