format comments in libp2p error.go file

pkg/p2p/libp2p/error.go

 // Copyright 2020 The Swarm Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
+
 package libp2p
 
-// This error is handled specially by libp2p
-// If returned by specific protocol handler it causes peer disconnect
+// This error is handled specially by libp2p. If returned by specific protocol
+// handler it causes peer disconnect.
 type disconnectError struct {
 	err error
 }
 
-// Disconnect wraps error and creates a special error that is treated specially by libp2p
-// It causes peer disconnect
+// Disconnect wraps error and creates a special error that is treated specially
+// by libp2p. It causes peer to disconnect.
 func Disconnect(err error) error {
 	return &disconnectError{
 		err: err,
 	}
 }
 
-// Unwrap returns an underlying error
+// Unwrap returns an underlying error.
 func (e *disconnectError) Unwrap() error { return e.err }
 
-// Error implements function of the standard go error interface
+// Error implements function of the standard go error interface.
 func (e *disconnectError) Error() string {
 	return e.err.Error()
 }