Juanma Barranquero <lekktu@gmai...> writes:

>> I'd probably be tempted to use
>>
>>     (error (concat "No further undo information"
>>                    (and transient-mark-mode mark-active
>>                         " for region")))
>
> Yes, in this case I think yours is better. But if the argument is a variable:
>
>   (lambda (arg) (error (format "This is the error: %s" arg)))
>
> would be preferable to
>
>   (lambda (arg) (error "This is the error: %s" arg))
>
> ?

Not at all.  The former is prone to bug out when "arg" contains "%"
somewhere.  The latter works fine in this case.

--
David Kastrup, Kriemhildstr. 15, 44793 Bochum


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