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doc/codewalk/markov: fix syntax and broken link
Part of issue 3424. R=golang-dev, r CC=golang-dev https://golang.org/cl/5955050
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@ -215,7 +215,7 @@ p[len(p)-1] = suffix
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<step title="Choosing a suffix at random" src="doc/codewalk/markov.go:/next := choices/,/Shift/">
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To choose a suffix we use the
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<code><a href="/pkg/rand/#Intn">rand.Intn</a></code> function.
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<code><a href="/pkg/math/rand/#Intn">rand.Intn</a></code> function.
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It returns a random integer up to (but not including) the provided
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value. Passing in <code>len(choices)</code> gives us a random index
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into the full length of the list.
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@ -287,11 +287,11 @@ a plan a man a plan a canal panama</pre>
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Here's a transcript of generating some text using the Go distribution's
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README file as source material:
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<pre>
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$ ./markov -words=10 < $GOROOT/go/README
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$ ./markov -words=10 < $GOROOT/README
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This is the source code repository for the Go source
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$ ./markov -prefix=1 -words=10 < $GOROOT/go/README
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$ ./markov -prefix=1 -words=10 < $GOROOT/README
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This is the go directory (the one containing this README).
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$ ./markov -prefix=1 -words=10 < $GOROOT/go/README
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$ ./markov -prefix=1 -words=10 < $GOROOT/README
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This is the variable if you have just untarred a</pre>
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</step>
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