SWAG completed

lm_eval/tasks/swag/swag.yaml

+group:
+  - multiple_choice
+task: swag
+dataset_path: swag
+dataset_name: regular
+output_type: multiple_choice
+training_split: train
+validation_split: validation
+test_split: null
+template_aliases: "{% set answer_choices = [ending0, ending1, ending2, ending3] %}{% set gold = label %}"
+doc_to_text: "{{startphrase}}"
+doc_to_target: "{{answer_choices[gold]}}"
+gold_alias: "{{gold}}"
+metric_list:
+  - metric: acc
+    aggregation: mean
+    higher_is_better: true
+  - metric: acc_norm
+    aggregation: mean
+    higher_is_better: true
\ No newline at end of file