updated for version 7.3.937

Problem:    More can be shared between Python 2 and 3.
Solution:   Move code to if_py_both.h. (ZyX)

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    937,
 /**/
     936,
 /**/