all: more typos

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/5720044
diff --git a/src/pkg/io/pipe.go b/src/pkg/io/pipe.go
index 69f9051..f3f0f17 100644
--- a/src/pkg/io/pipe.go
+++ b/src/pkg/io/pipe.go
@@ -178,7 +178,7 @@
 // It is safe to call Read and Write in parallel with each other or with
 // Close. Close will complete once pending I/O is done. Parallel calls to
 // Read, and parallel calls to Write, are also safe:
-// the invidual calls will be gated sequentially.
+// the individual calls will be gated sequentially.
 func Pipe() (*PipeReader, *PipeWriter) {
 	p := new(pipe)
 	p.rwait.L = &p.l