Release notes and version bump for 6.5.4

diff --git a/docs/releases.rst b/docs/releases.rst
index 3d69d7af150aa8c3af7e5d3517331aaad6415d86..23502c2fec44a95c24f86dfb4aa3b317aa541e6e 100644 (file)
--- a/docs/releases.rst
+++ b/docs/releases.rst
@@ -4,6 +4,7 @@ Release notes
 .. toctree::
    :maxdepth: 2
 
+   releases/v6.5.4
    releases/v6.5.3
    releases/v6.5.2
    releases/v6.5.1

diff --git a/docs/releases/v6.5.4.rst b/docs/releases/v6.5.4.rst
new file mode 100644 (file)
index 0000000..7f3819f
--- /dev/null
+++ b/docs/releases/v6.5.4.rst
@@ -0,0 +1,13 @@
+What's new in Tornado 6.5.4
+===========================
+
+Dec 15, 2025
+------------
+
+Bug fixes
+~~~~~~~~~
+
+- The ``in`` operator for ``HTTPHeaders`` was incorrectly case-sensitive, causing
+  lookups to fail for headers with different casing than the original header name.
+  This was a regression in version 6.5.3 and has been fixed to restore the intended
+  case-insensitive behavior from version 6.5.2 and earlier.