Revert `tests/testdata` changes and address flake8 issues

tests/testdata/pile_opensubtitles-v1-res.json

-{"results": {"pile_opensubtitles": {"bits_per_byte": 2.1948356082685497e-05, "byte_perplexity": 1.0000152135568616, "word_perplexity": 1.0000856162053249}}, "versions": {"pile_opensubtitles": 1}}
+{"results": {"pile_opensubtitles": {"bits_per_byte": 2.1948356082685497e-05, "byte_perplexity": 1.0000152135568616, "word_perplexity": 1.0000856162053249}}, "versions": {"pile_opensubtitles": 1}}
\ No newline at end of file

tests/testdata/pile_openwebtext2-v0-loglikelihood_rolling

-5d6c19665f429ab1ccbe027da67f42bdaf219f819ab093673976eee55e015ff4
+5d6c19665f429ab1ccbe027da67f42bdaf219f819ab093673976eee55e015ff4
\ No newline at end of file

tests/testdata/pile_openwebtext2-v0-res.json

-{"results": {"pile_openwebtext2": {"bits_per_byte": 0.00012809520662477846, "byte_perplexity": 1.000128103411166, "word_perplexity": 1.0007951516532847}}, "versions": {"pile_openwebtext2": 0}}
+{"results": {"pile_openwebtext2": {"bits_per_byte": 0.00012809520662477846, "byte_perplexity": 1.000128103411166, "word_perplexity": 1.0007951516532847}}, "versions": {"pile_openwebtext2": 0}}
\ No newline at end of file

tests/testdata/pile_openwebtext2-v1-loglikelihood_rolling

-5d6c19665f429ab1ccbe027da67f42bdaf219f819ab093673976eee55e015ff4
+5d6c19665f429ab1ccbe027da67f42bdaf219f819ab093673976eee55e015ff4
\ No newline at end of file

tests/testdata/pile_openwebtext2-v1-res.json

-{"results": {"pile_openwebtext2": {"bits_per_byte": 0.000184802319359215, "byte_perplexity": 1.000128103411166, "word_perplexity": 1.0007951516532847}}, "versions": {"pile_openwebtext2": 1}}
+{"results": {"pile_openwebtext2": {"bits_per_byte": 0.000184802319359215, "byte_perplexity": 1.000128103411166, "word_perplexity": 1.0007951516532847}}, "versions": {"pile_openwebtext2": 1}}
\ No newline at end of file

tests/testdata/pile_philpapers-v0-loglikelihood_rolling

-339ba5d8c044c4a3ff9b9a8eaa24da1d6c01b72972074eb671a7da049eeb7047
+339ba5d8c044c4a3ff9b9a8eaa24da1d6c01b72972074eb671a7da049eeb7047
\ No newline at end of file

tests/testdata/pile_philpapers-v0-res.json

-{"results": {"pile_philpapers": {"bits_per_byte": 6.241575895982095e-06, "byte_perplexity": 1.0000062415953748, "word_perplexity": 1.0000409888564146}}, "versions": {"pile_philpapers": 0}}
+{"results": {"pile_philpapers": {"bits_per_byte": 6.241575895982095e-06, "byte_perplexity": 1.0000062415953748, "word_perplexity": 1.0000409888564146}}, "versions": {"pile_philpapers": 0}}
\ No newline at end of file

tests/testdata/pile_philpapers-v1-loglikelihood_rolling

-339ba5d8c044c4a3ff9b9a8eaa24da1d6c01b72972074eb671a7da049eeb7047
+339ba5d8c044c4a3ff9b9a8eaa24da1d6c01b72972074eb671a7da049eeb7047
\ No newline at end of file

tests/testdata/pile_philpapers-v1-res.json

-{"results": {"pile_philpapers": {"bits_per_byte": 9.004690592465457e-06, "byte_perplexity": 1.0000062415953748, "word_perplexity": 1.0000409888564146}}, "versions": {"pile_philpapers": 1}}
+{"results": {"pile_philpapers": {"bits_per_byte": 9.004690592465457e-06, "byte_perplexity": 1.0000062415953748, "word_perplexity": 1.0000409888564146}}, "versions": {"pile_philpapers": 1}}
\ No newline at end of file

tests/testdata/pile_pile-cc-v0-loglikelihood_rolling

-731fdef4a43949b179ba0c540148ebc2fa41583dd583ef580dd812076c66a451
+731fdef4a43949b179ba0c540148ebc2fa41583dd583ef580dd812076c66a451
\ No newline at end of file

tests/testdata/pile_pile-cc-v0-res.json

-{"results": {"pile_pile-cc": {"bits_per_byte": 0.00011234131907228174, "byte_perplexity": 1.0001123476295946, "word_perplexity": 1.0006738958554477}}, "versions": {"pile_pile-cc": 0}}
+{"results": {"pile_pile-cc": {"bits_per_byte": 0.00011234131907228174, "byte_perplexity": 1.0001123476295946, "word_perplexity": 1.0006738958554477}}, "versions": {"pile_pile-cc": 0}}
\ No newline at end of file

tests/testdata/pile_pile-cc-v1-loglikelihood_rolling

-731fdef4a43949b179ba0c540148ebc2fa41583dd583ef580dd812076c66a451
+731fdef4a43949b179ba0c540148ebc2fa41583dd583ef580dd812076c66a451
\ No newline at end of file

tests/testdata/pile_pile-cc-v1-res.json

-{"results": {"pile_pile-cc": {"bits_per_byte": 0.0001620742639125056, "byte_perplexity": 1.0001123476295946, "word_perplexity": 1.0006738958554477}}, "versions": {"pile_pile-cc": 1}}
+{"results": {"pile_pile-cc": {"bits_per_byte": 0.0001620742639125056, "byte_perplexity": 1.0001123476295946, "word_perplexity": 1.0006738958554477}}, "versions": {"pile_pile-cc": 1}}
\ No newline at end of file

tests/testdata/pile_pubmed-abstracts-v0-loglikelihood_rolling

-66436569a43163afb2caf422d32c5f329899e74c49865d4d13881fd465fd9976
+66436569a43163afb2caf422d32c5f329899e74c49865d4d13881fd465fd9976
\ No newline at end of file

tests/testdata/pile_pubmed-abstracts-v0-res.json

-{"results": {"pile_pubmed-abstracts": {"bits_per_byte": 0.00037553733051528816, "byte_perplexity": 1.0003756078534862, "word_perplexity": 1.0025884332779}}, "versions": {"pile_pubmed-abstracts": 0}}
+{"results": {"pile_pubmed-abstracts": {"bits_per_byte": 0.00037553733051528816, "byte_perplexity": 1.0003756078534862, "word_perplexity": 1.0025884332779}}, "versions": {"pile_pubmed-abstracts": 0}}
\ No newline at end of file

tests/testdata/pile_pubmed-abstracts-v1-loglikelihood_rolling

-66436569a43163afb2caf422d32c5f329899e74c49865d4d13881fd465fd9976
+66436569a43163afb2caf422d32c5f329899e74c49865d4d13881fd465fd9976
\ No newline at end of file

tests/testdata/pile_pubmed-abstracts-v1-res.json

-{"results": {"pile_pubmed-abstracts": {"bits_per_byte": 0.0005417858444030858, "byte_perplexity": 1.0003756078534862, "word_perplexity": 1.0025884332779}}, "versions": {"pile_pubmed-abstracts": 1}}
+{"results": {"pile_pubmed-abstracts": {"bits_per_byte": 0.0005417858444030858, "byte_perplexity": 1.0003756078534862, "word_perplexity": 1.0025884332779}}, "versions": {"pile_pubmed-abstracts": 1}}
\ No newline at end of file

tests/testdata/pile_pubmed-central-v0-loglikelihood_rolling

-40b39d120d99a145690444e86acc3e3e24d41e6e0538a75e26929ad84926e5e0
+40b39d120d99a145690444e86acc3e3e24d41e6e0538a75e26929ad84926e5e0
\ No newline at end of file

tests/testdata/pile_pubmed-central-v0-res.json

-{"results": {"pile_pubmed-central": {"bits_per_byte": 1.5812411832795375e-05, "byte_perplexity": 1.0000158125368497, "word_perplexity": 1.000123107107861}}, "versions": {"pile_pubmed-central": 0}}
+{"results": {"pile_pubmed-central": {"bits_per_byte": 1.5812411832795375e-05, "byte_perplexity": 1.0000158125368497, "word_perplexity": 1.000123107107861}}, "versions": {"pile_pubmed-central": 0}}
\ No newline at end of file

tests/testdata/pile_pubmed-central-v1-loglikelihood_rolling

-40b39d120d99a145690444e86acc3e3e24d41e6e0538a75e26929ad84926e5e0
+40b39d120d99a145690444e86acc3e3e24d41e6e0538a75e26929ad84926e5e0
\ No newline at end of file