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9 Conditions  9.1 Condition System Concepts 9.1.3 Printing Conditions 9.1.3.1 Recommended Style in Condition Reporting
9.1.3.1.2 Leading and Trailing Newlines in Condition Reports
It is recommended that a report message not begin with any
introductory text, such as "Error: " or "Warning: "
or even just freshline or newline.
Such text is added, if appropriate to the context,
by the routine invoking the condition reporter.
It is recommended that a report message not be followed
by a trailing freshline or newline.
Such text is added, if appropriate to the context,
by the routine invoking the condition reporter.
(error "This is a message.~%") ; Not recommended
(error "~&This is a message.") ; Not recommended
(error "~&This is a message.~%") ; Not recommended
(error "This is a message.") ; Recommended instead
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