Create patch set 4

Uploaded patch set 4.

Patch-set: 4
Subject: Polish the Introduction of the Four Opens book
Commit: 19ee0e0a44
Tag: autogenerated:gerrit:newPatchSet
Groups: 19ee0e0a44
This commit is contained in:
Gerrit User 9562 2021-04-06 14:07:33 +00:00 committed by Gerrit Code Review
parent b54f5f15fe
commit 64ad22ca81

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