This fixes packaging issues like this one.
```===> Checking for items in STAGEDIR missing from pkg-plist
Error: Orphaned: %%PYTHON_SITELIBDIR%%/scipy/io/tests/data/Transparent Busy.ani===>
Checking for items in pkg-plist which are not in STAGEDIR
Error: Missing: "/usr/local/%%PYTHON_SITELIBDIR%%/scipy/io/tests/data/Transparent Busy.ani"
===> Error: Plist issues found.
```
I tested an update to scient/py-scipy, which includes a plist entry with a space, and this patch fixed the issue. I see many other ports have pkg-plist entries with spaces and no quotes, so I assume this will not introduce new issues. Am I missing anything?
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