Digital fuzzy query does not work

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Riot version (or commit ref): v0.0.0-20201013133145-f4c30acb3704
Go version: v1.15
Operating system and bit:
Can you reproduce the bug at Examples:
- [ ] Yes (provide example code)
- [ ] No
- [ ] Not relevant
Provide example code:

        searcher := riot.Engine{}
    searcher.Init(types.EngineOpts{
        Using: 3,
        //GseDict: "testdata/dictionary.txt",
        IndexerOpts: &types.IndexerOpts{
            IndexType: types.DocIdsIndex,
        },
    })
    defer searcher.Close()

    text := "《复仇者联盟3：无限战争》a123是全片使用IMAX摄影机拍摄"
    text1 := "复仇:者在IMAX影院放222映时"
    text2 := "全片以上下扩展至IMAX 1.9：1的宽高比来呈现"

    text3 := "Google Is Experimenting With Virtual Reality Advertising"
    text4 := `Google accidentally pushed Bluetooth update for Home
    speaker early`
    text5 := `Google is testing another Search results layout with 
    rounded cards, new colors, and the 4 mysterious colored dots again`

    //for i := 6; i < 10000; i++ {
    //  in := strconv.Itoa(i)
    //  content := fmt.Sprintf(format, i)
    //  searcher.Index(in, types.DocData{
    //      Content: content,
    //  })
    //}

    // 将文档加入索引，docId 从0开始
    searcher.Index("0", types.DocData{Content: text})
    searcher.Index("1", types.DocData{Content: text1})
    searcher.Index("2", types.DocData{Content: text2})
    searcher.Index("3", types.DocData{Content: text3})
    searcher.Index("4", types.DocData{Content: text4})
    searcher.Index("5", types.DocData{Content: text5})

    // 等待索引刷新完毕
    searcher.Flush()

    // 搜索输出格式见 types.SearchResp 结构体
    result := searcher.Search(types.SearchReq{
        Text: "123",
    })
    log.Print(result.NumDocs)
    log.Print(result)

Log gist:


2021/01/08 14:36:33 Dictionary file path is empty, load the default dictionary file.
2021/01/08 14:36:33 Dict files path:  [/Users/zc/go/pkg/mod/github.com/go-ego/gse@v0.64.1/data/dict/dictionary.txt]
2021/01/08 14:36:33 Load the gse dictionary: "/Users/zc/go/pkg/mod/github.com/go-ego/gse@v0.64.1/data/dict/dictionary.txt" 
2021/01/08 14:36:35 Gse dictionary loaded finished.
2021/01/08 14:36:35 Check virtualMemory...
2021/01/08 14:36:35 Total: 17179869184, Free: 4401246208, UsedPercent: 51.322794%
2021/01/08 14:36:35 0
2021/01/08 14:36:35 {{[123] false 0} []}



## Description

...

go-ego / riot

Digital fuzzy query does not work #124