text/scanner: use Go convention in Position doc comment

[mehradsadeghi]

No description provided.

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[mehradsadeghi]

@googlebot I signed it!

[gopherbot]

This PR (HEAD: 8fd5ab0) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/go/+/335149 to see it.

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Message from Go Bot:

Patch Set 1:

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[gopherbot]

Message from Ian Lance Taylor:

Patch Set 1: Run-TryBot+1 Code-Review+2

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[gopherbot]

Message from Go Bot:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Ian Lance Taylor:

Patch Set 1:

(2 comments)

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[gopherbot]

Message from Go Bot:

Patch Set 1: TryBot-Result+1

(1 comment)

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[gopherbot]

Message from Mehrad:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Robert Griesemer:

Patch Set 2: Code-Review+2 Trust+1

(1 comment)

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[gopherbot]

Message from Mehrad:

Patch Set 2:

(2 comments)

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[gopherbot]

This PR is being closed because golang.org/cl/335149 has been merged.