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1. Commits on Jul 18, 2026

   • [3.15] gh-71896: Add a docs warning about trailing newlines ignored by `difflib.HtmlDiff` (GH-153930) (GH-153965)

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     miss-islington

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     Lenormju

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2. Commits on May 22, 2026

   • [3.15] gh-149189: Revert "Modern defaults for `pprint` (GH-149190)" (GH-150249) (#150268)

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     miss-islington

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     hugovk

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3. Commits on May 6, 2026

   • gh-144384: Lazily import `_colorize` (#149318)

     hugovk

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4. Commits on May 5, 2026

   • gh-149189: Modern defaults for `pprint` (#149190)

     hugovk

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5. Commits on Feb 23, 2026

   • gh-145131: difflib.Differ._fancy_replace performance (re-use ratio) (#145133)

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     dg-pb

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6. Commits on Dec 30, 2025

   • gh-142939: difflib.get_close_matches performance (#142940)

     dg-pb

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7. Commits on Sep 22, 2025

   • gh-95953: Add a css class to changed lines of difflib.HtmlDiff make_table (#139226)

     KatieLG

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8. Commits on Aug 8, 2025

   • gh-133722: Add Difflib theme to `_colorize` and 'color' option to `difflib.unified_diff` (#133725)

     dougthor42

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9. Commits on Jun 27, 2025

   • gh-128051: Fix tests if sys.float_repr_style is 'legacy' (#135908)

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     skirpichev

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     vstinner

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10. Commits on May 28, 2025

    • gh-134580: Modernizing `difflib.HtmlDiff` for HTML Output (#134581)

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      Wulian233

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      hugovk

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11. Commits on May 1, 2025

    • gh-130167: Improve ``difflib.IS_LINE_JUNK`` performance by using string methods (#130170)

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      5 peopleauthored
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12. Commits on Mar 14, 2025

    • gh-131204: Fix `difflib.HtmlDiff` may not use monospaced font (#131221)

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13. Commits on Mar 13, 2025

    • gh-93096: Remove CLI interface for `difflib` (#131099)

      donbarbos

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14. Commits on Feb 11, 2025

    • gh-129939: Add darkmode support for difflib's comparison pages (#129940)

      Wulian233

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15. Commits on Jun 10, 2024

    • gh-115801: Only allow sequence of strings as input for difflib.unified_diff (GH-118333)

      eendebakpt

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16. Commits on May 25, 2024

    • gh-119105: Differ.compare is too slow [for degenerate cases] (#119492)

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      tim-one

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17. Commits on May 22, 2024

    • gh-119105: difflib.py Differ.compare is too slow [for degenerate cases] (#119376)

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      tim-one

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18. Commits on May 19, 2024

    • gh-119105: difflib: improve recursion for degenerate cases (#119131)

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      pulkin

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      tim-one

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19. Commits on Apr 27, 2022

    • Correct method name typo (#91970)

      supakeen

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20. Commits on Oct 6, 2021

    • Fix typos in the Lib directory (GH-28775)

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      cclauss

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      terryjreedy

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      745c9d9View commit details

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21. Commits on Sep 21, 2021

    • bpo-45216: Remove extraneous method docs from `difflib` (GH-28445)

      sobolevn

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22. Commits on Apr 30, 2020

    • bpo-40394 - difflib.SequenceMatched.find_longest_match default args (GH-19742)

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      lrjball

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23. Commits on Apr 10, 2020

    • bpo-39481: PEP 585 for difflib, filecmp, fileinput (#19422)

      emmatyping

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24. Commits on Nov 12, 2019

    • bpo-38738: Fix formatting of True and False. (GH-17083)

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      serhiy-storchaka

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25. Commits on Aug 21, 2019

    • Fix difflib `?` hint in diff output when dealing with tabs (#15201)

      

      asottile

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      tim-one

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26. Commits on Jan 2, 2019

    • Revert "bpo-35603: Escape table header of make_table output that can cause potential XSS. (GH-11341)" (GH-11356)

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      serhiy-storchaka

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27. Commits on Dec 29, 2018

    • bpo-35603: Escape table header of make_table output that can cause potential XSS. (GH-11341)

      

      tirkarthi

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      serhiy-storchaka

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28. Commits on Apr 5, 2018

    • bpo-33224: PEP 479 fix for difflib.mdiff() (GH-6381)

      rhettinger

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29. Commits on Mar 4, 2018

    • bpo-32981: Fix catastrophic backtracking vulns (#5955)

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      3 peopleauthored and

      benjaminp

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30. Commits on Apr 5, 2017

    • bpo-29762: More use "raise from None". (#569)

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      serhiy-storchaka

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31. Commits on Sep 8, 2016

    • #27364: fix "incorrect" uses of escape character in the stdlib.

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      bitdancer

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32. Commits on Nov 2, 2015

    • Issue #25523: Merge "a" to "an" fixes from 3.4 into 3.5

      vadmium

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    • Issue #25523: Correct "a" article to "an" article

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      vadmium

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33. Commits on May 22, 2015

    • Issue 24237: Raise PendingDeprecationWarning per PEP 479

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      Yury Selivanov

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34. Commits on May 9, 2015

    • PEP 479: Change StopIteration handling inside generators.

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      Yury Selivanov

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