Fix/program doc#17908

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JiabinYang merged 9 commits intoPaddlePaddle:developfrom

JiabinYang:fix/Program_doc

Jun 28, 2019

Commits on Jun 6, 2019

Commits on Jun 14, 2019

test=develop, refine comments
JiabinYang
committed

Commits on Jun 17, 2019

Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into fix/Program_doc
JiabinYang
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Commits on Jun 20, 2019

Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into fix/Program_doc
JiabinYang
committed

Commits on Jun 21, 2019

Commits on Jun 27, 2019