Improve Progress.update_item() to make it simpler to understand.

Make raw output explicit instead of being a side effect of index=False.
Change all defaults to False so only True arguments have to be specified.
Use named arguments at all call sites to make the code clearer.

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git-svn-id: svn:// 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed