I also saw this problem.
I wrote a short patch.
This allows the space defined in the "setlocal backupcopy=".
How will it correct?
--------
Thanks.
Nobuhiro Takasaki
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diff -r 1b74025a66e7 src/option.c
--- a/src/option.c Sat Sep 27 11:18:20 2014 +0200
+++ b/src/option.c Mon Sep 29 12:15:05 2014 +0900
@@ -5744,7 +5744,8 @@
if (opt_strings_flags(bkc, p_bkc_values, flags, TRUE) != OK)
errmsg = e_invarg;
- if ((((int)*flags & BKC_AUTO) != 0)
+ if (!(opt_flags & OPT_LOCAL) &&
+ (((int)*flags & BKC_AUTO) != 0)
+ (((int)*flags & BKC_YES) != 0)
+ (((int)*flags & BKC_NO) != 0) != 1)
{
