Fix documentation typo.

	This is really insignificant, but it might as well be fixed.

R=golang-dev, brainman
CC=golang-dev
https://golang.org/cl/3832045

diff --git a/src/pkg/io/io.go b/src/pkg/io/io.go
index 2b2f4d567144ae73cddad52bfd2a5b374bdf3e78..fa1c0d2b06400e22259b3e2aa84d8dea588b6c35 100644 (file)
--- a/src/pkg/io/io.go
+++ b/src/pkg/io/io.go
@@ -203,7 +203,7 @@ func ReadFull(r Reader, buf []byte) (n int, err os.Error) {
 // If dst implements the ReaderFrom interface,
 // the copy is implemented by calling dst.ReadFrom(src).
 func Copyn(dst Writer, src Reader, n int64) (written int64, err os.Error) {
-       // If the writer has a ReadFrom method, use it to to do the copy.
+       // If the writer has a ReadFrom method, use it to do the copy.
        // Avoids a buffer allocation and a copy.
        if rt, ok := dst.(ReaderFrom); ok {
                return rt.ReadFrom(LimitReader(src, n))
@@ -246,12 +246,12 @@ func Copyn(dst Writer, src Reader, n int64) (written int64, err os.Error) {
 // Otherwise, if src implements the WriterTo interface,
 // the copy is implemented by calling src.WriteTo(dst).
 func Copy(dst Writer, src Reader) (written int64, err os.Error) {
-       // If the writer has a ReadFrom method, use it to to do the copy.
+       // If the writer has a ReadFrom method, use it to do the copy.
        // Avoids an allocation and a copy.
        if rt, ok := dst.(ReaderFrom); ok {
                return rt.ReadFrom(src)
        }
-       // Similarly, if the reader has a WriteTo method, use it to to do the copy.
+       // Similarly, if the reader has a WriteTo method, use it to do the copy.
        if wt, ok := src.(WriterTo); ok {
                return wt.WriteTo(dst)
        }