[[!debbug 123456]] expands to "bug #123456", which is hyperlinked. Could you please drop the leading "bug", for two reasons?
First, #123456 is not a bug, it's a bug report. And second, #123456 suffices, doesn't it? By hardcoding the "bug" in there, you make it impossible to start a sentence with a bug number, e.g.:
There are problems with code. #123456 is a good example of...
There are problems with code. bug #123456 is a good example of...
Tschwinge changed it to expand to "Debian bug #xxxx". Which happens to sidestep the start of sentence problem. I think it makes sense to be explicit about whose bug it is, in general -- but you can always edit the shortcuts page for your own wiki to use something shorter and more implicit. --Joey done