blog: delete spurious & in article about errors

bufio.NewWriter already returns a pointer.

Change-Id: I6348b11c2dcb4a371aefb4a151c68fbb6b4bc616
Reviewed-on: https://go-review.googlesource.com/3268
Reviewed-by: Andrew Gerrand <adg@golang.org>

content/errors-are-values.article

diff --git a/content/errors-are-values.article b/content/errors-are-values.article
index eff779e..95a7d3f 100644
--- a/content/errors-are-values.article
+++ b/content/errors-are-values.article
@@ -207,7 +207,7 @@
 The `Write` method of `bufio.Writer` behaves just like our `errWriter.write`
 method above, with `Flush` reporting the error, so our example could be written like this:
 
-	b := &bufio.NewWriter(fd)
+	b := bufio.NewWriter(fd)
 	b.Write(p0[a:b])
 	b.Write(p1[c:d])
 	b.Write(p2[e:f])