Paragraph 1, no literal syntax

>>> indented_doctest_block()
None

Paragraph 2, no literal syntax

>>> unindented_doctest_block()
None

Paragraph 3, no literal syntax

def foo():

return None

Paragraph 4, expanded literal syntax

def foo():
    return None

Paragraph 5, partially minimized literal syntax

def foo():
    return None

Paragraph 6, fully minimized literal syntax:

def foo():
    return None

Paragraph 7, code block, no language

def foo():
    return None

Paragraph 8, code block, language=python

def foo():
    return None

Paragraph 9, Sphinx doctest block