Unicode字符串替换不适用于完整的变音符号阿拉伯文本

从视觉上看，您的2个字符串是相似的，但它们有一个不同的unicode字符串：Fathaَ和Shada的顺序在位置上交换。这对视觉没有影响，因为这两种情况在Fatha下的Shadda渲染方式相同：。

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