ENH: savez: temporary file alongside with target file and improve exception message upon IOError #7133
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Should fully resolve #5336 -- for output of large files temporary files would be created alongside with target ones, so it would be logical to expect sufficient amount of storage available (unlike under TEMPDIR). Also error message would carry the filename of the tempfile in question which could better direct user toward possible problems on the target partition.
I haven't tested it locally, neither looked into where to provide such a test -- let's see first if travis says Ok. If testing desired -- point to location where to provide one. Cheers!