patch 8.2.3961: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.
diff --git a/src/message.c b/src/message.c
index 8768065..36e4548 100644
--- a/src/message.c
+++ b/src/message.c
@@ -1051,7 +1051,7 @@
 
     if (*eap->arg != NUL)
     {
-	emsg(_(e_invarg));
+	emsg(_(e_invalid_argument));
 	return;
     }