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-rw-r--r--autoload/spellfile_local.vim2
1 files changed, 1 insertions, 1 deletions
diff --git a/autoload/spellfile_local.vim b/autoload/spellfile_local.vim
index 92ace4c..eba7358 100644
--- a/autoload/spellfile_local.vim
+++ b/autoload/spellfile_local.vim
@@ -111,7 +111,7 @@ endfunction
" Join a list of strings into a comma-separated option
function! s:OptionJoin(list) abort
return join(map(
- \ a:list,
+ \ copy(a:list),
\ 'substitute(v:val, ''\\\@<!,'', ''\\,'', ''g'')',
\), ',')
endfunction