fix typos

Signed-off-by: allencloud <allen.sun@daocloud.io>

daemon/discovery.go

@@ -75,8 +75,8 @@ func discoveryOpts(clusterOpts map[string]string) (time.Duration, time.Duration,
 	return heartbeat, ttl, nil
 }
 
-// initDiscovery initialized the nodes discovery subsystem by connecting to the specified backend
+// initDiscovery initializes the nodes discovery subsystem by connecting to the specified backend
-// and start a registration loop to advertise the current node under the specified address.
+// and starts a registration loop to advertise the current node under the specified address.
 func initDiscovery(backendAddress, advertiseAddress string, clusterOpts map[string]string) (discoveryReloader, error) {
 	heartbeat, backend, err := parseDiscoveryOptions(backendAddress, clusterOpts)
 	if err != nil {

image/rootfs_unix.go

@@ -6,7 +6,7 @@ import "github.com/docker/docker/layer"
 
 // RootFS describes images root filesystem
 // This is currently a placeholder that only supports layers. In the future
-// this can be made into a interface that supports different implementations.
+// this can be made into an interface that supports different implementations.
 type RootFS struct {
 	Type    string         `json:"type"`
 	DiffIDs []layer.DiffID `json:"diff_ids,omitempty"`

image/rootfs_windows.go

@@ -12,7 +12,7 @@ import (
 
 // RootFS describes images root filesystem
 // This is currently a placeholder that only supports layers. In the future
-// this can be made into a interface that supports different implementations.
+// this can be made into an interface that supports different implementations.
 type RootFS struct {
 	Type      string         `json:"type"`
 	DiffIDs   []layer.DiffID `json:"diff_ids,omitempty"`

layer/layer.go

@@ -1,11 +1,11 @@
-// Package layer is package for managing read only
+// Package layer is package for managing read-only
 // and read-write mounts on the union file system
 // driver. Read-only mounts are referenced using a
 // content hash and are protected from mutation in
 // the exposed interface. The tar format is used
-// to create read only layers and export both
+// to create read-only layers and export both
-// read only and writable layers. The exported
+// read-only and writable layers. The exported
-// tar data for a read only layer should match
+// tar data for a read-only layer should match
 // the tar used to create the layer.
 package layer
 
@@ -75,7 +75,7 @@ type TarStreamer interface {
 	TarStream() (io.ReadCloser, error)
 }
 
-// Layer represents a read only layer
+// Layer represents a read-only layer
 type Layer interface {
 	TarStreamer
 
@@ -138,7 +138,7 @@ type RWLayer interface {
 }
 
 // Metadata holds information about a
-// read only layer
+// read-only layer
 type Metadata struct {
 	// ChainID is the content hash of the layer
 	ChainID ChainID
@@ -247,7 +247,7 @@ func ReleaseAndLog(ls Store, l Layer) {
 	LogReleaseMetadata(metadata)
 }
 
-// LogReleaseMetadata logs a metadata array, use this to
+// LogReleaseMetadata logs a metadata array, uses this to
 // ensure consistent logging for release metadata
 func LogReleaseMetadata(metadatas []Metadata) {
 	for _, metadata := range metadatas {

pkg/system/meminfo_linux.go

@@ -22,8 +22,7 @@ func ReadMemInfo() (*MemInfo, error) {
 }
 
 // parseMemInfo parses the /proc/meminfo file into
-// a MemInfo object given a io.Reader to the file.
+// a MemInfo object given an io.Reader to the file.
-//
 // Throws error if there are problems reading from the file
 func parseMemInfo(reader io.Reader) (*MemInfo, error) {
 	meminfo := &MemInfo{}