Fixes #179 so that tests comparing Content-Disposition headers work with all versions of Guzzle
minor #181 Fixes #179 (jeremeamia)

This PR was merged into the 2.0-dev branch.

Discussion
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Fixes #179

Fixes #179 so that the tests comparing "Content-Disposition" header values work with all versions of Guzzle.

Commits
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7c37f0f Fixes #179 so that tests comparing Content-Disposition headers work with all versions of Guzzle