Updates post 4.5.2 release

1 files changed, 48 insertions, 15 deletions

diff --git a/RELEASE.txt b/RELEASE.txt
index 12a275e7c..769a12dbe 100644
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -1,32 +1,65 @@
-A new SCons release, 4.5.2, is now available on the SCons download page:
+If you are reading this in the git repository, the contents
+refer to *unreleased* changes since the last SCons release.
+Past official release announcements appear at:
+
+    https://scons.org/tag/releases.html
+
+==================================================================
+
+A new SCons release, 4.5.3, is now available on the SCons download page:
 
     https://scons.org/pages/download.html
 
-Here is a summary of the changes since 4.5.1:
+
+Here is a summary of the changes since 4.5.2:
+
+NEW FUNCTIONALITY
+-----------------
+
+- List new features (presumably why a checkpoint is being released)
+
+DEPRECATED FUNCTIONALITY
+------------------------
+
+- List anything that's been deprecated since the last release
+
+CHANGED/ENHANCED EXISTING FUNCTIONALITY
+---------------------------------------
+
+- List modifications to existing features, where the previous behavior
+  wouldn't actually be considered a bug
 
 FIXES
 -----
 
--  Fix a problem (#4321) in 4.5.0/4.5.1 where ParseConfig could cause an
-   exception in MergeFlags when the result would be to add preprocessor
-   defines to existing CPPDEFINES. The following code illustrates the
-   circumstances that could trigger this:
-      env=Environment(CPPDEFINES=['a'])
-      env.Append(CPPDEFINES=['b'])
-      env.MergeFlags({'CPPDEFINES': 'c'})
+- List fixes of outright bugs
+
+IMPROVEMENTS
+------------
+
+- List improvements that wouldn't be visible to the user in the
+  documentation:  performance improvements (describe the circumstances
+  under which they would be observed), or major code cleanups
 
 PACKAGING
 ---------
 
-- Remove the redundant `wheel` dependency from `pyproject.toml`,
-  as it is added automatically by the setuptools PEP517 backend.
+- List changes in the way SCons is packaged and/or released
+
+DOCUMENTATION
+-------------
+
+- List any significant changes to the documentation (not individual
+  typo fixes, even if they're mentioned in src/CHANGES.txt to give
+  the contributor credit)
+
+DEVELOPMENT
+-----------
 
+- List visible changes in the way SCons is developed
 
 Thanks to the following contributors listed below for their contributions to this release.
 ==========================================================================================
 .. code-block:: text
 
-    git shortlog --no-merges -ns 4.5.1..HEAD
-     3  Mats Wichmann
-     2  William Deegan
-     1  Michał Górny
+    git shortlog --no-merges -ns 4.0.1..HEAD