The text of a quotation is processed normally except that:
This is an example of text written between an
@quotationcommand and an
@end quotationcommand. An
@quotationcommand is most often used to indicate text that is excerpted from another (real or hypothetical) printed work.
@quotation command as text on a line by itself. This
line will disappear from the output. Mark the end of the quotation
with a line beginning with and containing only
@end quotation line will likewise disappear from the
output. Thus, the following,
@quotation This is a foo. @end quotation
This is a foo.