add _IgnoreCustomTagsLoader and use it in load_yaml
#2859
braingramdownstream.yml
on: pull_request
asdf
/
Load tox environments
astropy
/
Load tox environments
stsci
/
Load tox environments
third-party
/
Load tox environments
Matrix: asdf / tox
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Matrix: astropy / tox
Waiting for pending jobs
Matrix: stsci / tox
Waiting for pending jobs
Matrix: third-party / tox
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