When you create a new topic or post a reply, the Forum Editor will provide a Toolbar with buttons. These buttons are shortcuts to inserting Markdown code. You can use the buttons or type the Markdown directly. The markdown used by the forum is very similar to “standard” Markdown, but there are some differences. See Discourse Markdown Documentation for details.

(Mouse-over a button to see a tooltip.)

From left to right the toolbar buttons are:

1. Quote Whole Post
2. Bold
3. Italic
4. Hyperlink
5. Blockquote
6. Preformatted text (code block)
7. Upload
8. Numbered List
9. Bulleted List
10. Heading
11. Horizontal Rule
12. Emoji

Place the code block between two lines of three backquotes: ```

```applescript
tell application "Finder"
	set selectedItemList to selection as alias list
end tell
```

The result looks like this:

snippet.applescript

tell application "Finder"
	set selectedItemList to selection as alias list
end tell

The forum software expands TAB into a large number of spaces. So you may want to convert leading TABs to 3 spaces before posting. Tools like BBEdit and TextWrangler make this easy with their built in RegEx (Grep) Find & Replace.

Find: all TAB characters:

snippet.regex

\t

Replace: with three SPACE characters

⋅⋅⋅

The reduced indentation makes larger scripts significantly easier to read:

snippet.applescript

tell application "Finder"
   set selectedItemList to selection as alias list
end tell

For more information, see: Discourse Markdown Documentation