\f
* Incompatible Lisp Changes in Emacs 25.2
++++
+** Resizing a frame no longer runs `window-configuration-change-hook'.
+Put your function on `window-size-change-functions' instead.
+
\f
* Lisp Changes in Emacs 25.2
** `ert-with-function-mocked' of 'ert-x package allows mocking of functions
in unit tests.
++++
+** New functions `window-pixel-width-before-size-change' and
+`window-pixel-height-before-size-change' allow to detect which window
+changed size when `window-size-change-functions' are run.
+
\f
* Changes in Emacs 25.2 on Non-Free Operating Systems