Documentation generation fix and update to changes file

CHANGES.current

@@ -345,7 +345,7 @@ Version 4.3.0 (in progress)
 
 2024-06-15: wsfulton
             [Python] Removed deprecated pytuplehlp.swg file and t_output_helper.
-            Use SWIG_Python_AppendOutput instead of t_output_helper.
+            Use SWIG_AppendOutput as a direct replacement for t_output_helper.
 
 	    *** POTENTIAL INCOMPATIBILITY ***
 
@@ -362,6 +362,13 @@ Version 4.3.0 (in progress)
             should be passed to it, indicating whether or not the wrapped
             function returns void.
 
+            Also consider replacing with:
+
+              SWIG_AppendOutput(PyObject* result, PyObject* obj);
+
+            which calls SWIG_Python_AppendOutput with same parameters but adding $isvoid
+            for final parameter.
+
 	    *** POTENTIAL INCOMPATIBILITY ***
 
 2024-06-15: wsfulton

Doc/Manual/maketoc.py

@@ -28,7 +28,7 @@ for c in chs:
     c = c.strip()
     print("Processing " + c)
     if c:
-        os.system("python makechap.py %s %d >> Contents.html" % (c,num))
+        os.system("python3 makechap.py %s %d >> Contents.html" % (c,num))
     num += 1
 
 f = open("Contents.html","a")