scmutil: display the optional hint when handling StorageError in catchall()...
scmutil: display the optional hint when handling StorageError in catchall()
Other than CensoredNodeError (which is also a StorageError), it looks like all
exceptions with a hint display them. I'm not sure that it makes sense to have a
hint for censored nodes, so I'm not bothering with that.
It looks like nobody is using this yet, as the tests don't change.