No way to indent text?

[Dan Dascalescu]

How could one indent (not quote) a block of text?

This is commonly done in Wikipedia with one or more colons at the
beginning of the line, and is very handy for threaded discussions.

An example is at
http://en.wikipedia.org/w/index.php?title=Wikipedia:Articles_for_deletion/MojoMojo&diff=next&oldid=275101911

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Dan Dascalescu
http://wiki.dandascalescu.com