Revert `tests/testdata` changes and address flake8 issues

tests/testdata/pile_freelaw-v1-res.json

-{"results": {"pile_freelaw": {"bits_per_byte": 4.5623635481434923e-05, "byte_perplexity": 1.0000316243943415, "word_perplexity": 1.000203169094218}}, "versions": {"pile_freelaw": 1}}
+{"results": {"pile_freelaw": {"bits_per_byte": 4.5623635481434923e-05, "byte_perplexity": 1.0000316243943415, "word_perplexity": 1.000203169094218}}, "versions": {"pile_freelaw": 1}}
\ No newline at end of file

tests/testdata/pile_github-v0-loglikelihood_rolling

-df384c3df3d8f53273e97127c5bb84c17e638acad7d6bc9c91f6dee96d43b639
+df384c3df3d8f53273e97127c5bb84c17e638acad7d6bc9c91f6dee96d43b639
\ No newline at end of file

tests/testdata/pile_github-v0-res.json

-{"results": {"pile_github": {"bits_per_byte": 9.540627613754646e-05, "byte_perplexity": 1.0000954108274611, "word_perplexity": 1.0009643183931227}}, "versions": {"pile_github": 0}}
+{"results": {"pile_github": {"bits_per_byte": 9.540627613754646e-05, "byte_perplexity": 1.0000954108274611, "word_perplexity": 1.0009643183931227}}, "versions": {"pile_github": 0}}
\ No newline at end of file

tests/testdata/pile_github-v1-loglikelihood_rolling

-df384c3df3d8f53273e97127c5bb84c17e638acad7d6bc9c91f6dee96d43b639
+df384c3df3d8f53273e97127c5bb84c17e638acad7d6bc9c91f6dee96d43b639
\ No newline at end of file

tests/testdata/pile_github-v1-res.json

-{"results": {"pile_github": {"bits_per_byte": 0.00013764216145332133, "byte_perplexity": 1.0000954108274611, "word_perplexity": 1.0009643183931227}}, "versions": {"pile_github": 1}}
+{"results": {"pile_github": {"bits_per_byte": 0.00013764216145332133, "byte_perplexity": 1.0000954108274611, "word_perplexity": 1.0009643183931227}}, "versions": {"pile_github": 1}}
\ No newline at end of file

tests/testdata/pile_gutenberg-v0-loglikelihood_rolling

-02a559f74a9105145e7d4d9c5ddea372b5b4938f5368dc8ffafc39cbe3b4c7ef
+02a559f74a9105145e7d4d9c5ddea372b5b4938f5368dc8ffafc39cbe3b4c7ef
\ No newline at end of file

tests/testdata/pile_gutenberg-v0-res.json

-{"results": {"pile_gutenberg": {"bits_per_byte": 1.2443606332351536e-06, "byte_perplexity": 1.0000012443614075, "word_perplexity": 1.0000072174665404}}, "versions": {"pile_gutenberg": 0}}
+{"results": {"pile_gutenberg": {"bits_per_byte": 1.2443606332351536e-06, "byte_perplexity": 1.0000012443614075, "word_perplexity": 1.0000072174665404}}, "versions": {"pile_gutenberg": 0}}
\ No newline at end of file

tests/testdata/pile_gutenberg-v1-loglikelihood_rolling

-02a559f74a9105145e7d4d9c5ddea372b5b4938f5368dc8ffafc39cbe3b4c7ef
+02a559f74a9105145e7d4d9c5ddea372b5b4938f5368dc8ffafc39cbe3b4c7ef
\ No newline at end of file

tests/testdata/pile_gutenberg-v1-res.json

-{"results": {"pile_gutenberg": {"bits_per_byte": 1.7952329146458065e-06, "byte_perplexity": 1.0000012443614075, "word_perplexity": 1.0000072174665404}}, "versions": {"pile_gutenberg": 1}}
+{"results": {"pile_gutenberg": {"bits_per_byte": 1.7952329146458065e-06, "byte_perplexity": 1.0000012443614075, "word_perplexity": 1.0000072174665404}}, "versions": {"pile_gutenberg": 1}}
\ No newline at end of file

tests/testdata/pile_hackernews-v0-loglikelihood_rolling

-ec1082ee5a5326e0d57aa4e73b634937140c1de9af95f154e8ab57b05d9b422b
+ec1082ee5a5326e0d57aa4e73b634937140c1de9af95f154e8ab57b05d9b422b
\ No newline at end of file

tests/testdata/pile_hackernews-v0-res.json

-{"results": {"pile_hackernews": {"bits_per_byte": 0.00010170276359193358, "byte_perplexity": 1.0001017079354932, "word_perplexity": 1.0006273924348839}}, "versions": {"pile_hackernews": 0}}
+{"results": {"pile_hackernews": {"bits_per_byte": 0.00010170276359193358, "byte_perplexity": 1.0001017079354932, "word_perplexity": 1.0006273924348839}}, "versions": {"pile_hackernews": 0}}
\ No newline at end of file

tests/testdata/pile_hackernews-v1-loglikelihood_rolling

-ec1082ee5a5326e0d57aa4e73b634937140c1de9af95f154e8ab57b05d9b422b
+ec1082ee5a5326e0d57aa4e73b634937140c1de9af95f154e8ab57b05d9b422b
\ No newline at end of file

tests/testdata/pile_hackernews-v1-res.json

-{"results": {"pile_hackernews": {"bits_per_byte": 0.00014672607267878518, "byte_perplexity": 1.0001017079354932, "word_perplexity": 1.0006273924348839}}, "versions": {"pile_hackernews": 1}}
+{"results": {"pile_hackernews": {"bits_per_byte": 0.00014672607267878518, "byte_perplexity": 1.0001017079354932, "word_perplexity": 1.0006273924348839}}, "versions": {"pile_hackernews": 1}}
\ No newline at end of file

tests/testdata/pile_nih-exporter-v0-loglikelihood_rolling

-520ea6e04e8a39dc0b5f63a837429a78a40e63d39d109096101feb8c5b2cf8d8
+520ea6e04e8a39dc0b5f63a837429a78a40e63d39d109096101feb8c5b2cf8d8
\ No newline at end of file

tests/testdata/pile_nih-exporter-v0-res.json

-{"results": {"pile_nih-exporter": {"bits_per_byte": 0.00024394433346975716, "byte_perplexity": 1.0002439740903082, "word_perplexity": 1.0016712202288802}}, "versions": {"pile_nih-exporter": 0}}
+{"results": {"pile_nih-exporter": {"bits_per_byte": 0.00024394433346975716, "byte_perplexity": 1.0002439740903082, "word_perplexity": 1.0016712202288802}}, "versions": {"pile_nih-exporter": 0}}
\ No newline at end of file

tests/testdata/pile_nih-exporter-v1-loglikelihood_rolling

-520ea6e04e8a39dc0b5f63a837429a78a40e63d39d109096101feb8c5b2cf8d8
+520ea6e04e8a39dc0b5f63a837429a78a40e63d39d109096101feb8c5b2cf8d8
\ No newline at end of file

tests/testdata/pile_nih-exporter-v1-res.json

-{"results": {"pile_nih-exporter": {"bits_per_byte": 0.00035193728014978225, "byte_perplexity": 1.0002439740903082, "word_perplexity": 1.0016712202288802}}, "versions": {"pile_nih-exporter": 1}}
+{"results": {"pile_nih-exporter": {"bits_per_byte": 0.00035193728014978225, "byte_perplexity": 1.0002439740903082, "word_perplexity": 1.0016712202288802}}, "versions": {"pile_nih-exporter": 1}}
\ No newline at end of file

tests/testdata/pile_opensubtitles-v0-loglikelihood_rolling

-0f1c23a1f4ddec0c2b1ff34de8d1505b0eb9e2868d8edbcc1b6de13d02f32036
+0f1c23a1f4ddec0c2b1ff34de8d1505b0eb9e2868d8edbcc1b6de13d02f32036
\ No newline at end of file

tests/testdata/pile_opensubtitles-v0-res.json

-{"results": {"pile_opensubtitles": {"bits_per_byte": 1.5213441136639177e-05, "byte_perplexity": 1.0000152135568616, "word_perplexity": 1.0000856162053249}}, "versions": {"pile_opensubtitles": 0}}
+{"results": {"pile_opensubtitles": {"bits_per_byte": 1.5213441136639177e-05, "byte_perplexity": 1.0000152135568616, "word_perplexity": 1.0000856162053249}}, "versions": {"pile_opensubtitles": 0}}
\ No newline at end of file

tests/testdata/pile_opensubtitles-v1-loglikelihood_rolling

-0f1c23a1f4ddec0c2b1ff34de8d1505b0eb9e2868d8edbcc1b6de13d02f32036
+0f1c23a1f4ddec0c2b1ff34de8d1505b0eb9e2868d8edbcc1b6de13d02f32036
\ No newline at end of file