fixes#141 h/t @tgfjt . Original message:
using #parse_si 'Phonetic Properties' items for Japanese excel files,
the Phonetic items(KATAKANA) represents pronunciation hints of String(KANJI).
```xml
<si>
<t>漢字(japanese KANJI)</t>
<rPh>
<t>フリガナ(this is KATAKANA for pronounciation:漢字)</t>
</rPh>
</si>
```
It expected get '漢字' . but got '漢字フリガナ'.
so replace these string, because this can be caused by only `<rPh>`.
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