Add UNKs to label dictionaries by default #2435
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…s | deprecate make_tag_dictionary
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Changes
make_label_dictionaryto add UNKs by default. Otherwise the label dictionary causes problems if loss needs to be calculated for labels outside the dictionary (for instance, if test data contains labels that don't exist in train).These errors were undetected since our unit tests were using
make_tag_dictionaryinstead ofmake_label_dictionary. For this reason, this PR finally marksmake_tag_dictionaryas deprecated and updates the unit tests.