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topics: return early so that other if conditions don't get execute (issue5600)
Sun, 25 Jun 2017 06:53:22 +0530, by Pulkit Goyal
test: extra output to understand the next changeset better
Mon, 26 Jun 2017 17:47:04 +0200, by Pierre-Yves David
topics: move the logic to change or clear current topic into a new function
Sun, 25 Jun 2017 06:47:59 +0530, by Pulkit Goyal

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