http2: fix typos

http2/frame.go

@@ -1477,7 +1477,7 @@ func (fr *Framer) maxHeaderStringLen() int {
 }
 
 // readMetaFrame returns 0 or more CONTINUATION frames from fr and
-// merge them into into the provided hf and returns a MetaHeadersFrame
+// merge them into the provided hf and returns a MetaHeadersFrame
 // with the decoded hpack values.
 func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
 	if fr.AllowIllegalReads {

http2/h2c/h2c.go

@@ -293,7 +293,7 @@ func (c *rwConn) Write(p []byte) (int, error) {
 	return n, err
 }
 
-// settingsAckSwallowWriter is a writer that normally forwards bytes to it's
+// settingsAckSwallowWriter is a writer that normally forwards bytes to its
 // underlying Writer, but swallows the first SettingsAck frame that it sees.
 type settingsAckSwallowWriter struct {
 	Writer     *bufio.Writer

http2/server.go

@@ -1110,7 +1110,7 @@ func (sc *serverConn) startFrameWrite(wr FrameWriteRequest) {
 
 // errHandlerPanicked is the error given to any callers blocked in a read from
 // Request.Body when the main goroutine panics. Since most handlers read in the
-// the main ServeHTTP goroutine, this will show up rarely.
+// main ServeHTTP goroutine, this will show up rarely.
 var errHandlerPanicked = errors.New("http2: handler panicked")
 
 // wroteFrame is called on the serve goroutine with the result of

http2/write.go

@@ -329,7 +329,7 @@ func (wu writeWindowUpdate) writeFrame(ctx writeContext) error {
 }
 
 // encodeHeaders encodes an http.Header. If keys is not nil, then (k, h[k])
-// is encoded only only if k is in keys.
+// is encoded only if k is in keys.
 func encodeHeaders(enc *hpack.Encoder, h http.Header, keys []string) {
 	if keys == nil {
 		sorter := sorterPool.Get().(*sorter)