Revert `tests/testdata` changes and address flake8 issues

tests/testdata/triviaqa-v0-res.json

-{"results": {"triviaqa": {"acc": 0.0, "acc_stderr": 0.0}}, "versions": {"triviaqa": 0}}
+{"results": {"triviaqa": {"acc": 0.0, "acc_stderr": 0.0}}, "versions": {"triviaqa": 0}}
\ No newline at end of file

tests/testdata/truthfulqa_gen-v0-greedy_until

-0d7c56e1aa71ffd8f94bde28f6e8dfdd35f7aaadffa0620bd2a27704253d6c14
+0d7c56e1aa71ffd8f94bde28f6e8dfdd35f7aaadffa0620bd2a27704253d6c14
\ No newline at end of file

tests/testdata/truthfulqa_gen-v0-res.json

-{"results": {"truthfulqa_gen": {"bleu_acc": 0.0, "bleu_acc_stderr": 0.0, "bleu_diff": 0.0, "bleu_diff_stderr": 0.0, "bleu_max": 0.0, "bleu_max_stderr": 0.0, "bleurt_acc": 0.8372093023255814, "bleurt_acc_stderr": 0.012923696051772253, "bleurt_diff": 0.13967358205134603, "bleurt_diff_stderr": 0.00532907098769571, "bleurt_max": -1.4402793981454072, "bleurt_max_stderr": 0.0021884846359458963, "rouge1_acc": 0.0, "rouge1_acc_stderr": 0.0, "rouge1_diff": 0.0, "rouge1_diff_stderr": 0.0, "rouge1_max": 0.0, "rouge1_max_stderr": 0.0, "rouge2_acc": 0.0, "rouge2_acc_stderr": 0.0, "rouge2_diff": 0.0, "rouge2_diff_stderr": 0.0, "rouge2_max": 0.0, "rouge2_max_stderr": 0.0, "rougeL_acc": 0.0, "rougeL_acc_stderr": 0.0, "rougeL_diff": 0.0, "rougeL_diff_stderr": 0.0, "rougeL_max": 0.0, "rougeL_max_stderr": 0.0}}, "versions": {"truthfulqa_gen": 0}}
+{"results": {"truthfulqa_gen": {"bleu_acc": 0.0, "bleu_acc_stderr": 0.0, "bleu_diff": 0.0, "bleu_diff_stderr": 0.0, "bleu_max": 0.0, "bleu_max_stderr": 0.0, "bleurt_acc": 0.8372093023255814, "bleurt_acc_stderr": 0.012923696051772253, "bleurt_diff": 0.13967358205134603, "bleurt_diff_stderr": 0.00532907098769571, "bleurt_max": -1.4402793981454072, "bleurt_max_stderr": 0.0021884846359458963, "rouge1_acc": 0.0, "rouge1_acc_stderr": 0.0, "rouge1_diff": 0.0, "rouge1_diff_stderr": 0.0, "rouge1_max": 0.0, "rouge1_max_stderr": 0.0, "rouge2_acc": 0.0, "rouge2_acc_stderr": 0.0, "rouge2_diff": 0.0, "rouge2_diff_stderr": 0.0, "rouge2_max": 0.0, "rouge2_max_stderr": 0.0, "rougeL_acc": 0.0, "rougeL_acc_stderr": 0.0, "rougeL_diff": 0.0, "rougeL_diff_stderr": 0.0, "rougeL_max": 0.0, "rougeL_max_stderr": 0.0}}, "versions": {"truthfulqa_gen": 0}}
\ No newline at end of file

tests/testdata/truthfulqa_gen-v1-greedy_until

-1a280973bbac2b7ac29dd64dddac474fb4749585f7de893483b4034814466c67
+1a280973bbac2b7ac29dd64dddac474fb4749585f7de893483b4034814466c67
\ No newline at end of file

tests/testdata/truthfulqa_gen-v1-res.json

-{"results": {"truthfulqa_gen": {"bleu_acc": 0.0, "bleu_acc_stderr": 0.0, "bleu_diff": 0.0, "bleu_diff_stderr": 0.0, "bleu_max": 0.0, "bleu_max_stderr": 0.0, "bleurt_acc": 0.835985312117503, "bleurt_acc_stderr": 0.012962704327492454, "bleurt_diff": 0.14077322143090107, "bleurt_diff_stderr": 0.005459888909582694, "bleurt_max": -1.4399358725752065, "bleurt_max_stderr": 0.0022126992369197133, "rouge1_acc": 0.0, "rouge1_acc_stderr": 0.0, "rouge1_diff": 0.0, "rouge1_diff_stderr": 0.0, "rouge1_max": 0.0, "rouge1_max_stderr": 0.0, "rouge2_acc": 0.0, "rouge2_acc_stderr": 0.0, "rouge2_diff": 0.0, "rouge2_diff_stderr": 0.0, "rouge2_max": 0.0, "rouge2_max_stderr": 0.0, "rougeL_acc": 0.0, "rougeL_acc_stderr": 0.0, "rougeL_diff": 0.0, "rougeL_diff_stderr": 0.0, "rougeL_max": 0.0, "rougeL_max_stderr": 0.0}}, "versions": {"truthfulqa_gen": 1}}
+{"results": {"truthfulqa_gen": {"bleu_acc": 0.0, "bleu_acc_stderr": 0.0, "bleu_diff": 0.0, "bleu_diff_stderr": 0.0, "bleu_max": 0.0, "bleu_max_stderr": 0.0, "bleurt_acc": 0.835985312117503, "bleurt_acc_stderr": 0.012962704327492454, "bleurt_diff": 0.14077322143090107, "bleurt_diff_stderr": 0.005459888909582694, "bleurt_max": -1.4399358725752065, "bleurt_max_stderr": 0.0022126992369197133, "rouge1_acc": 0.0, "rouge1_acc_stderr": 0.0, "rouge1_diff": 0.0, "rouge1_diff_stderr": 0.0, "rouge1_max": 0.0, "rouge1_max_stderr": 0.0, "rouge2_acc": 0.0, "rouge2_acc_stderr": 0.0, "rouge2_diff": 0.0, "rouge2_diff_stderr": 0.0, "rouge2_max": 0.0, "rouge2_max_stderr": 0.0, "rougeL_acc": 0.0, "rougeL_acc_stderr": 0.0, "rougeL_diff": 0.0, "rougeL_diff_stderr": 0.0, "rougeL_max": 0.0, "rougeL_max_stderr": 0.0}}, "versions": {"truthfulqa_gen": 1}}
\ No newline at end of file

tests/testdata/truthfulqa_mc-v0-loglikelihood

-226a6783976177dc9ceda5688623ff37023242eff30ddf270b886bf7b9b32228
+226a6783976177dc9ceda5688623ff37023242eff30ddf270b886bf7b9b32228
\ No newline at end of file

tests/testdata/truthfulqa_mc-v0-res.json

-{"results": {"truthfulqa_mc": {"mc1": 0.2141982864137087, "mc1_stderr": 0.01436214815569045, "mc2": 0.465436996173817, "mc2_stderr": 0.0048422530880316405}}, "versions": {"truthfulqa_mc": 0}}
+{"results": {"truthfulqa_mc": {"mc1": 0.2141982864137087, "mc1_stderr": 0.01436214815569045, "mc2": 0.465436996173817, "mc2_stderr": 0.0048422530880316405}}, "versions": {"truthfulqa_mc": 0}}
\ No newline at end of file

tests/testdata/truthfulqa_mc-v1-loglikelihood

-1e07020e9cf41d46ed65312eb39d2b8e6599673d4f0d6b67c0d0eba0efb493bb
+1e07020e9cf41d46ed65312eb39d2b8e6599673d4f0d6b67c0d0eba0efb493bb
\ No newline at end of file

tests/testdata/truthfulqa_mc-v1-res.json

-{"results": {"truthfulqa_mc": {"mc1": 0.23255813953488372, "mc1_stderr": 0.01478915753108052, "mc2": 0.4462325560722362, "mc2_stderr": 0.004986523944692003}}, "versions": {"truthfulqa_mc": 1}}
+{"results": {"truthfulqa_mc": {"mc1": 0.23255813953488372, "mc1_stderr": 0.01478915753108052, "mc2": 0.4462325560722362, "mc2_stderr": 0.004986523944692003}}, "versions": {"truthfulqa_mc": 1}}
\ No newline at end of file

tests/testdata/webqs-v0-loglikelihood

-96b218173468cc94552a0b946193bda89faba51f1bfc3e7945531f9dff8d6fe9
+96b218173468cc94552a0b946193bda89faba51f1bfc3e7945531f9dff8d6fe9
\ No newline at end of file

tests/testdata/webqs-v0-res.json

-{"results": {"webqs": {"acc": 0.0, "acc_stderr": 0.0}}, "versions": {"webqs": 0}}
+{"results": {"webqs": {"acc": 0.0, "acc_stderr": 0.0}}, "versions": {"webqs": 0}}
\ No newline at end of file

tests/testdata/wic-v0-loglikelihood

-403a08da05e4c44d7e3dd3358382a7ba489c41d223e24cd1a9ed82ef1a2d004b
+403a08da05e4c44d7e3dd3358382a7ba489c41d223e24cd1a9ed82ef1a2d004b
\ No newline at end of file

tests/testdata/wic-v0-res.json

-{"results": {"wic": {"acc": 0.49216300940438873, "acc_stderr": 0.01980828765781383}}, "versions": {"wic": 0}}
+{"results": {"wic": {"acc": 0.49216300940438873, "acc_stderr": 0.01980828765781383}}, "versions": {"wic": 0}}
\ No newline at end of file

tests/testdata/wikitext-v0-loglikelihood_rolling

-b6f83e6cf7535ee41b0057c3e2ec2cf7f2fa5a9119b305c479a83091d1142b2c
+b6f83e6cf7535ee41b0057c3e2ec2cf7f2fa5a9119b305c479a83091d1142b2c
\ No newline at end of file

tests/testdata/wikitext-v0-res.json

-{"results": {"wikitext": {"bits_per_byte": 2.219817611605802e-05, "byte_perplexity": 1.0000221984224973, "word_perplexity": 1.000118710696617}}, "versions": {"wikitext": 0}}
+{"results": {"wikitext": {"bits_per_byte": 2.219817611605802e-05, "byte_perplexity": 1.0000221984224973, "word_perplexity": 1.000118710696617}}, "versions": {"wikitext": 0}}
\ No newline at end of file

tests/testdata/wikitext-v1-loglikelihood_rolling

-b6f83e6cf7535ee41b0057c3e2ec2cf7f2fa5a9119b305c479a83091d1142b2c
+b6f83e6cf7535ee41b0057c3e2ec2cf7f2fa5a9119b305c479a83091d1142b2c
\ No newline at end of file

tests/testdata/wikitext-v1-res.json

-{"results": {"wikitext": {"bits_per_byte": 3.202519859941674e-05, "byte_perplexity": 1.0000221984224973, "word_perplexity": 1.000118710696617}}, "versions": {"wikitext": 1}}
+{"results": {"wikitext": {"bits_per_byte": 3.202519859941674e-05, "byte_perplexity": 1.0000221984224973, "word_perplexity": 1.000118710696617}}, "versions": {"wikitext": 1}}
\ No newline at end of file

tests/testdata/winogrande-v0-loglikelihood

-90a3eff49de9173964d46f5ed57bcf9a78a72dd1bfe0e5323b25cebb40b49ea9
+90a3eff49de9173964d46f5ed57bcf9a78a72dd1bfe0e5323b25cebb40b49ea9
\ No newline at end of file

tests/testdata/winogrande-v0-res.json

-{"results": {"winogrande": {"acc": 0.516179952644041, "acc_stderr": 0.014045126130978606}}, "versions": {"winogrande": 0}}
+{"results": {"winogrande": {"acc": 0.516179952644041, "acc_stderr": 0.014045126130978606}}, "versions": {"winogrande": 0}}
\ No newline at end of file

tests/testdata/wmt14-en-fr-v0-greedy_until

-368ae7eec0f902b5123f2d5197caa5109a23942011c53fe68d9eaeee20180e46
+368ae7eec0f902b5123f2d5197caa5109a23942011c53fe68d9eaeee20180e46
\ No newline at end of file