patch 8.1.1113: making an autocommand trigger once is not so easy
Problem: Making an autocommand trigger once is not so easy.
Solution: Add the ++once argument. Also add ++nested as an alias for
"nested". (Justin M. Keyes, closes #4100)
diff --git a/src/globals.h b/src/globals.h
index e7ea84e..adf98f2 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1401,6 +1401,7 @@
EXTERN char e_invaddr[] INIT(= N_("E14: Invalid address"));
EXTERN char e_invarg[] INIT(= N_("E474: Invalid argument"));
EXTERN char e_invarg2[] INIT(= N_("E475: Invalid argument: %s"));
+EXTERN char e_duparg2[] INIT(= N_("E983: Duplicate argument: %s"));
EXTERN char e_invargval[] INIT(= N_("E475: Invalid value for argument %s"));
EXTERN char e_invargNval[] INIT(= N_("E475: Invalid value for argument %s: %s"));
#ifdef FEAT_EVAL