updated for version 7.3.966
Problem:    There is ":py3do" but no ":pydo".
Solution:   Add the ":pydo" command. (Lilydjwg)
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index b9ad364..75e1724 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -739,6 +739,8 @@
 			TRLBAR|CMDWIN),
 EX(CMD_python,		"python",	ex_python,
 			RANGE|EXTRA|NEEDARG|CMDWIN),
+EX(CMD_pydo,		"pydo",		ex_pydo,
+			RANGE|DFLALL|EXTRA|NEEDARG|CMDWIN),
 EX(CMD_pyfile,		"pyfile",	ex_pyfile,
 			RANGE|FILE1|NEEDARG|CMDWIN),
 EX(CMD_py3,		"py3",		ex_py3,