patch 9.0.0085: ":write" fails after ":file name" and the ":edit"

Problem:    ":write" fails after ":file name" and the ":edit".
Solution:   Reset BF_NOTEDITED when using ":edit". (closes #10790)
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 5253863..6e5e09f 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2973,6 +2973,11 @@
     // Assume success now
     retval = OK;
 
+    // If the file name was changed, reset the not-edit flag so that ":write"
+    // works.
+    if (!other_file)
+	curbuf->b_flags &= ~BF_NOTEDITED;
+
     /*
      * Check if we are editing the w_arg_idx file in the argument list.
      */