change minor mistake of spelling

Signed-off-by: allencloud <allen.sun@daocloud.io>
Upstream-commit: 7c3657065cc04af278a0f1cee99de8c2401ba0ef
Component: engine

components/engine/api/server/router/swarm/backend.go

@@ -7,7 +7,7 @@ import (
 	"golang.org/x/net/context"
 )
 
-// Backend abstracts an swarm commands manager.
+// Backend abstracts a swarm manager.
 type Backend interface {
 	Init(req types.InitRequest) (string, error)
 	Join(req types.JoinRequest) error

components/engine/api/swagger.yaml

@@ -4108,7 +4108,7 @@ paths:
       tags: ["Container"]
     get:
       summary: "Get an archive of a filesystem resource in a container"
-      description: "Get an tar archive of a resource in the filesystem of container id."
+      description: "Get a tar archive of a resource in the filesystem of container id."
       operationId: "ContainerGetArchive"
       produces:
         - "application/x-tar"

components/engine/api/types/network/network.go

@@ -28,7 +28,7 @@ type EndpointIPAMConfig struct {
 	LinkLocalIPs []string `json:",omitempty"`
 }
 
-// PeerInfo represents one peer of a overlay network
+// PeerInfo represents one peer of an overlay network
 type PeerInfo struct {
 	Name string
 	IP   string

components/engine/api/types/seccomp.go

@@ -10,7 +10,7 @@ type Seccomp struct {
 	Syscalls      []*Syscall     `json:"syscalls"`
 }
 
-// Architecture is used to represent an specific architecture
+// Architecture is used to represent a specific architecture
 // and its sub-architectures
 type Architecture struct {
 	Arch      Arch   `json:"architecture"`

components/engine/api/types/types.go

@@ -154,11 +154,11 @@ type Version struct {
 	BuildTime     string `json:",omitempty"`
 }
 
-// Commit records a external tool actual commit id version along the
-// one expect by dockerd as set at build time
+// Commit holds the Git-commit (SHA1) that a binary was built from, as reported
+// in the version-string of external tools, such as containerd, or runC.
 type Commit struct {
-	ID       string
-	Expected string
+	ID       string // ID is the actual commit ID of external tool.
+	Expected string // Expected is the commit ID of external tool expected by dockerd as set at build time.
 }
 
 // Info contains response of Engine API: