Add filename to err msg when we can't stat of file

Helps customer better troubleshoot the problem.
Fix unit test on windows
example updates from the doc team
Merge branch 'print-stat-err-filename' into develop

* print-stat-err-filename:
  Fix unit test on windows
  Add filename to err msg when we can't stat of file
Re-add cbacc26c58b1d4c196f715727b6647dcd7a13cb1 (doc example fix)

Looks like this was accidently reintroduced.  We do *not*
automatically use multipart uploads in the low level ``s3api`` commands,
you need to use the high level ``s3`` commands to get that behavior.
Merge branch 'EronHennessey-doc-example-updates' into develop

* EronHennessey-doc-example-updates:
  Re-add cbacc26c58b1d4c196f715727b6647dcd7a13cb1 (doc example fix)
  example updates from the doc team