A little cleanup of GzipFile handling--somehow I didn't notice that the _GZIP_FILE_TYPES tuple was not actually being used directly. I also found a few other places where it should be used, and fixed a subtle issue with how the name of a GzipFile is retrieved.
A little cleanup of GzipFile handling--somehow I didn't notice that the _GZIP_FILE_TYPES tuple was not actually being used directly. I also found a few other places where it should be used, and fixed a subtle issue with how the name of a GzipFile is retrieved.

spacetelescope/PyFITS,spacetelescope/PyFITS