[MERGE][Bug #113990] update command does not print summary of changes made (like the pull command does)

[Aaron Bentley]

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Daniel Watkins wrote:

> This is a patch so that 'bzr update' reports a summary of changes (a la
> 'pull' and 'status') upon completion.

In fact, if it has to update both the tree to the branch and the branch
to the master, it will do it twice.

I don't think that's ideal, but maybe it's rare enough that we should
put it in anyhow.

> +            conflicts = tree.update(delta._ChangeReporter(unversioned_filter=tree.is_ignored))

^^^ This line looks much longer than 79 chars.

Aaron
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