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Replace references to LinearProgressIndicator in CircularProgressIndicator example (#103349)

* Replace references to LinearProgressIndicator in CircularProgressIndicator example

* Add test

* fix copyright header
B
Bryan Oltman committed
89f755c2df3eef9c27bc27242ccf318ff1577bed
Parent: 106ab98
Committed by GitHub <noreply@github.com> on 5/9/2022, 8:04:02 PM