os: fix minor typo

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5697051

diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 1c3d0172d3433c0021b0bfa246d969f340f13a97..4acf35d675508d62ff25e832acddbb67190ab774 100644 (file)
--- a/src/pkg/os/file.go
+++ b/src/pkg/os/file.go
@@ -25,7 +25,7 @@
 //     open file.go: no such file or directory
 //
 // The file's data can then be read into a slice of bytes. Read and
-// Write take their byte counts from the length of the artument slice.
+// Write take their byte counts from the length of the argument slice.
 //
 //     data := make([]byte, 100)
 //     count, err := file.Read(data)