wcs-grab --version (return code: 0)
wcs-grab: invalid option -- '-'
This program is part of the Astrometry.net suite.
For details, visit http://astrometry.net.
Git URL https://github.com/dstndstn/astrometry.net
Revision 0.72, date Mon_Jul_10_14:37:28_2017_-0400.
Usage: wcs-grab <input-filename> <extension> <output-filename>
wcs-grab --help (return code: 0)
wcs-grab: invalid option -- '-'
This program is part of the Astrometry.net suite.
For details, visit http://astrometry.net.
Git URL https://github.com/dstndstn/astrometry.net
Revision 0.72, date Mon_Jul_10_14:37:28_2017_-0400.
Usage: wcs-grab <input-filename> <extension> <output-filename>