Fix changelog, bump version.

Author: kpeeters

cmake/version.cmake

@@ -1,7 +1,7 @@
 set(CADABRA_VERSION_MAJOR 2)
 set(CADABRA_VERSION_MINOR 3)
 set(CADABRA_VERSION_PATCH 1)
-set(CADABRA_VERSION_TWEAK 14)
+set(CADABRA_VERSION_TWEAK 15)
 set(COPYRIGHT_YEARS "2001-2020")
 math(EXPR SYSTEM_BITS "${CMAKE_SIZEOF_VOID_P} * 8")
 find_program(GIT git PATHS ${GIT_DIR})

web2/cadabra2/source/changelog.html

@@ -39,6 +39,9 @@ <h3>github master (2.3.1)</h3>
     (Dominic).</li>
   <li>Fixes for compatibility with newer <tt>SymPy</tt> versions.</li>
   <li>Added a 'find' function in the notebook, to search input cells.</li>
+  <li>New Jupyter kernel (enabled by default) which does not require
+  Xeus; you can now get access to Cadabra on Jupyter on all supported
+  systems, not just Conda (Fergus).</li>
 </ul>
 
 <a name="2.3.0"></a>
@@ -58,9 +61,6 @@ <h3>2.3.0 (released 10-Jun-2020)</h3>
   <li>Various fixes for behaviour of <tt>unwrap</tt> with anti- or
     non-commuting arguments.</li>
   <li>New <tt>meld</tt> algorithm for canonicalisation (Dominic).</li>
-  <li>New Jupyter kernel (enabled by default) which does not require
-  Xeus; you can now get access to Cadabra on Jupyter on all supported
-  systems, not just Conda (Fergus).</li>
 </ul>
 
 <a name="2.2.8"></a>