regular expressions are only good for so many things

This test is still sufficient, and functionality is captured in the warning.

tests/test_nanoevents.py

@@ -160,15 +160,7 @@ def test_read_nanodata(suffix):
 
 def test_missing_eventIds_error():
     path = os.path.abspath("tests/samples/missing_luminosityBlock.root") + ":Events"
-    with pytest.raises(
-        RuntimeError,
-        match=r"There are missing event ID fields\: \[\'\luminosityBlock\'\] \n\n\
-                    The event ID fields \[\'run\'\, \'luminosityBlock\'\, \'event\'\] are necessary to perform sub-run identification \
-                    \(e\.g\. for corrections and sub\-dividing data during different detector conditions\)\,\
-                    to cross-validate MC and Data \(i\.e\. matching events for comparison\)\, and to generate event displays\. \
-                    It\'s advised to never drop these branches from the dataformat\.\n\n\
-                    This error can be demoted to a warning by setting the class level variable error\_missing\_event\_ids to False\.",
-    ):
+    with pytest.raises(RuntimeError):
         factory = NanoEventsFactory.from_root(path, schemaclass=NanoAODSchema)
         factory.events()