io: fix typo inside copyBuffer

The "rt" seems to be caused after copy-pasting the previous "wt" block
which make sense as WriterTo, but for ReaderFrom it makes more sense
thinking of rf instead of rt.

Change-Id: I873699c27211bea6cdba3e199f36eb3c38188d70
GitHub-Last-Rev: 1795600a9b29946d824ba645c137da216bdf6302
GitHub-Pull-Request: golang/go#66811
Reviewed-on: https://go-review.googlesource.com/c/go/+/578635
Reviewed-by: Ian Lance Taylor <iant@google.com>
Commit-Queue: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>

diff --git a/src/io/io.go b/src/io/io.go
index 7f16e18d7d1baadce7b1d0413b53b97990578836..00edcde763a55ae326a70f7c02a26a39d4f5261a 100644 (file)
--- a/src/io/io.go
+++ b/src/io/io.go
@@ -411,8 +411,8 @@ func copyBuffer(dst Writer, src Reader, buf []byte) (written int64, err error) {
                return wt.WriteTo(dst)
        }
        // Similarly, if the writer has a ReadFrom method, use it to do the copy.
-       if rt, ok := dst.(ReaderFrom); ok {
-               return rt.ReadFrom(src)
+       if rf, ok := dst.(ReaderFrom); ok {
+               return rf.ReadFrom(src)
        }
        if buf == nil {
                size := 32 * 1024