Begin post-3.18 development

Help/release/dev/0-sample-topic.rst

+0-sample-topic
+--------------
+
+* This is a sample release note for the change in a topic.
+  Developers should add similar notes for each topic branch
+  making a noteworthy change.  Each document should be named
+  and titled to match the topic name to avoid merge conflicts.

Help/release/index.rst

@@ -7,6 +7,8 @@ CMake Release Notes
   This file should include the adjacent "dev.txt" file
   in development versions but not in release versions.
 
+.. include:: dev.txt
+
 Releases
 ========
 

Source/CMakeVersion.cmake

 # CMake version number components.
 set(CMake_VERSION_MAJOR 3)
 set(CMake_VERSION_MINOR 18)
-set(CMake_VERSION_PATCH 0)
-set(CMake_VERSION_RC 0)
+set(CMake_VERSION_PATCH 20200605)
+#set(CMake_VERSION_RC 0)
 set(CMake_VERSION_IS_DIRTY 0)
 
 # Start with the full version number used in tags.  It has no dev info.