The line suggesting the command line for updating a fork, needs a carriage return. In the example below, the "hg update default" statement is on the same line as the "hg pull ..." statement. This confused me for a moment.
$ hg pull -r default https://ArcoOost@bitbucket.org/ArcoOost/expanders$ hg update default $ hg merge 83586d1c760e
Regards, Arco Oost