patch 9.1.0849: there are a few typos in the source

Problem:  there are a few typos in the source.
Solution: Correct typos (zeertzjq).

closes: #16026

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 462232f..e1e6c4e 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2743,7 +2743,7 @@
 	}
 	if (buf == NULL)
 	    goto theend;
-	// autocommands try to edit a file that is goind to be removed,
+	// autocommands try to edit a file that is going to be removed,
 	// abort
 	if (buf_locked(buf))
 	{