Add 8 comments for event_multiplexer tests. (#9629)
Add 8 comments for event_multiplexer tests. (#9629)

* Add 8 comments for event_multiplexer tests.

* small fixes

ioeric/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,shakedel/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,agrubb/tensorboard,ioeric/tensorboard,qiuminxu/tensorboard,shakedel/tensorboard,tensorflow/tensorboard,agrubb/tensorboard,agrubb/tensorboard,qiuminxu/tensorboard,shakedel/tensorboard,qiuminxu/tensorboard,agrubb/tensorboard,shakedel/tensorboard,agrubb/tensorboard,tensorflow/tensorboard,francoisluus/tensorboard-supervise,agrubb/tensorboard,francoisluus/tensorboard-supervise,ioeric/tensorboard,tensorflow/tensorboard,ioeric/tensorboard,ioeric/tensorboard,shakedel/tensorboard,shakedel/tensorboard,ioeric/tensorboard