Redo cursor position is broken.

Originally reported by: **Anonymous**

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Redo cursor position should match Vim's.
Vim always puts the cursor at the *start* of the change that was just "redone". I notice that Evil does not do this correctly.d

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- Bitbucket: https://bitbucket.org/lyro/evil/issue/601

Reproduce a redo in Evil and compare the resulting cursor position with Vim, using the issue’s stated expectation as the reference. Locate the redo and cursor-position entry points in the repository, then verify that the cursor lands at the start of the redone change and add or update coverage for that behavior.

Written by the indexing model from the issue text.