Fix that :py3file was not working.
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index e45796f..ee9098a 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -743,6 +743,8 @@
 			RANGE|FILE1|NEEDARG|CMDWIN),
 EX(CMD_py3,		"py3",		ex_py3,
 			RANGE|EXTRA|NEEDARG|CMDWIN),
+EX(CMD_python3,		"python3",	ex_py3,
+			RANGE|EXTRA|NEEDARG|CMDWIN),
 EX(CMD_py3file,		"py3file",	ex_py3file,
 			RANGE|FILE1|NEEDARG|CMDWIN),
 EX(CMD_quit,		"quit",		ex_quit,