fix(docs): Correct first output example in Goroutine.md#9
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The first example has no time.Sleep, so the main goroutine exits before myGroutine runs. The output block incorrectly showed both lines; it should only show "end!!!".
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Summary
The first code example in
Goroutine.mddemonstrates that when the main goroutine exits, child goroutines are terminated before they can run. However, the output block incorrectly showed bothend!!!andmyGroutine, contradicting the explanation that follows ("为什么只打印了主协程里的'end！！！'").Fixed by removing the
myGroutineline from the first output block so it only showsend!!!, matching the expected behavior of the code (notime.Sleep, so the main goroutine exits before the child runs).Review / Merge checklist