zh-cn for Scala Tour:singleton-objects.md#1179

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realwunan:singleton-objects

Dec 3, 2018

Commits on Nov 15, 2018

zh-cn for Scala Tour:singleton-objects.md
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modify the Simplify Chinese translation of singleton-objects.md according to declan94's suggestions
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Commits on Dec 3, 2018

Fix Simplify some places according to liufengyun's suggestion
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