/usr/lib/iraf/extern/wcstools/wcstools.msg is in iraf-wcstools 3.9.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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| WCSTools World Coordinate System Utilities |
| Smithsonian Astrophysical Observatory |
| Telescope Data Center |
| |
| ***Warning: RAs on command line are always in degrees |
+-------------------------------------------------------------+
|