pkg: adjust "the a" in comments

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5476055

src/pkg/net/http/server.go

@@ -261,7 +261,7 @@ func (w *response) Header() Header {
 }
 
 // maxPostHandlerReadBytes is the max number of Request.Body bytes not
-// consumed by a handler that the server will read from the a client
+// consumed by a handler that the server will read from the client
 // in order to keep a connection alive.  If there are more bytes than
 // this then the server to be paranoid instead sends a "Connection:
 // close" response.

src/pkg/testing/testing.go

@@ -75,7 +75,7 @@ func Short() bool {
 	return *short
 }
 
-// decorate inserts the a final newline if needed and indentation tabs for formatting.
+// decorate inserts the final newline if needed and indentation tabs for formatting.
 // If addFileLine is true, it also prefixes the string with the file and line of the call site.
 func decorate(s string, addFileLine bool) string {
 	if addFileLine {