fix: reduce_english_filter.lua 不处理非英文单词 fix #505

lua/reduce_english_filter.lua

@@ -25,7 +25,7 @@ function M.func(input, env)
         for cand in input:iter() do
             index = index + 1
             -- 定位匹配的英文词
-            if not string.find(cand.preedit, " ") then
+            if not string.find(cand.preedit, " ") and not string.match(cand.text, "%A") then
                 table.insert(pending_cands, cand)
             else
                 yield(cand)