[nvim] fix: variable names conflicts

.config/nvim/lua/plugin/luasnip.lua

@@ -74,10 +74,12 @@ end
 -- Returns a snippet_node wrapped around an insert_node whose initial
 -- text value is set to the current date in the desired format.
 local function date_input(fmt)
-	local fmt = fmt or "%Y-%m-%d"
-	return sn(nil, i(1, os.date(fmt)))
+	local format = fmt or "%Y-%m-%d"
+	return sn(nil, i(1, os.date(format)))
 end
 
+local copy = utils.copy
+
 -- snippets are added via ls.add_snippets(filetype, snippets[, opts]), where
 -- opts may specify the `type` of the snippets ("snippets" or "autosnippets",
 -- for snippets that should expand directly after the trigger is typed).