[article Indented code blocks
    [quickbook 1.5]
    [source-mode teletype]
]

In a paragraph.
    Still in a paragraph.

    In a code block.

Back in a paragraph.

    Code block line 1.
 Code block line 2.
        Code block line 3.

Paragraph.

    Code block with no trailing blank lines.
Paragraph.

[heading Code blocks separated by comment]

    First code block.
[/ Comment]
    Second code block.
    [/ Comment in second code block]
    Still second code block.
    [/ Comment trailing second code block]