Usage documentation uses wrong function name for 'get_reader_class'

[djhoese]

Direct Usage:

https://github.com/pytroll/pygac/blob/main/doc/source/usage.rst#direct-usage

says get_reader_cls.

Actual code:

pygac/pygac/__init__.py

Line 34 in c5dcb32

from pygac.runner import get_reader_class, process_file # noqa

I'm not familiar with this code otherwise so I'm not sure what else might be wrong in this documentation. One of the maintainers should review all function calls in this documentation.

[carloshorn]

Definitely a typo in the documentation. The function get_reader_class selects the appropriate reader for a given file (LAC/GAC, POD/KLT).