Fix rename refactor issue when source does not ending with an EOL

[DonJayamanne]

Fixes #695

This pull request:

• Has a title summarizes what is changing
• Includes a news entry file (remember to thank yourself!)
• Has unit tests & code coverage is not adversely affected (within reason)
• Works on all actively maintained versions of Python (e.g. Python 2.7 & the latest Python 3 release)
• Works on Windows 10, macOS, and Linux (e.g. considered file system case-sensitivity)

[codecov]

Codecov Report

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@@            Coverage Diff            @@
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  Coverage          ?   73.86%           
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  Files             ?      279           
  Lines             ?    13049           
  Branches          ?     2329           
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  Hits              ?     9638           
  Misses            ?     3279           
  Partials          ?      132

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