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bufio: clarify that Flush returns a cached write error
Change-Id: I377403fc0981d58aec5d84a1dd0d4e08532a575c Reviewed-on: https://go-review.googlesource.com/41291 Reviewed-by: Dan Peterson <dpiddy@gmail.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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@ -513,7 +513,7 @@ func (b *Reader) writeBuf(w io.Writer) (int64, error) {
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// Writer implements buffering for an io.Writer object.
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// If an error occurs writing to a Writer, no more data will be
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// accepted and all subsequent writes will return the error.
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// accepted and all subsequent writes, and Flush, will return the error.
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// After all data has been written, the client should call the
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// Flush method to guarantee all data has been forwarded to
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// the underlying io.Writer.
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