Style cleanup
Cleanup test_into to use pytest effectively
xfail on csv -> dataframe
Use mkstemp to avoid race conditions
Use the filename not the file object
Use need to pass usecols here
Catch the error and close the file handle first
Close before we start failing
At least close
still remove
Close the file not just the table
No need for a class
Merge pull request #625 from cpcloud/fix-into-pytest

Clean up into