Cleaning some manifest documentation typos

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>

cli/command/manifest/create_list.go

@@ -30,7 +30,7 @@ func newCreateListCommand(dockerCli command.Cli) *cobra.Command {
 	}
 
 	flags := cmd.Flags()
-	flags.BoolVar(&opts.insecure, "insecure", false, "allow communication with an insecure registry")
+	flags.BoolVar(&opts.insecure, "insecure", false, "Allow communication with an insecure registry")
 	flags.BoolVarP(&opts.amend, "amend", "a", false, "Amend an existing manifest list")
 	return cmd
 }

cli/command/manifest/inspect.go

@@ -43,7 +43,7 @@ func newInspectCommand(dockerCli command.Cli) *cobra.Command {
 	}
 
 	flags := cmd.Flags()
-	flags.BoolVar(&opts.insecure, "insecure", false, "allow communication with an insecure registry")
+	flags.BoolVar(&opts.insecure, "insecure", false, "Allow communication with an insecure registry")
 	flags.BoolVarP(&opts.verbose, "verbose", "v", false, "Output additional info including layers and platform")
 	return cmd
 }

docs/reference/commandline/manifest.md

@@ -44,7 +44,7 @@ an image name in `docker pull` and `docker run` commands, for example.
 
 Ideally a manifest list is created from images that are identical in function for
 different os/arch combinations. For this reason, manifest lists are often referred to as
-"multi-arch images." However, a user could create a manifest list that points
+"multi-arch images". However, a user could create a manifest list that points
 to two images -- one for windows on amd64, and one for darwin on amd64.
 
 ### manifest inspect
@@ -54,11 +54,11 @@ manifest inspect --help
 
 Usage:  docker manifest inspect [OPTIONS] [MANIFEST_LIST] MANIFEST
 
-isplay an image manifest, or manifest list
+Display an image manifest, or manifest list
 
 Options:
       --help       Print usage
-      --insecure   allow communication with an insecure registry
+      --insecure   Allow communication with an insecure registry
   -v, --verbose    Output additional info including layers and platform
 ```
 
@@ -71,7 +71,7 @@ Create a local manifest list for annotating and pushing to a registry
 
 Options:
   -a, --amend      Amend an existing manifest list
-      --insecure   allow communication with an insecure registry
+      --insecure   Allow communication with an insecure registry
       --help       Print usage
 ```
 
@@ -98,7 +98,7 @@ Push a manifest list to a repository
 
 Options:
       --help       Print usage
-      --insecure   allow push to an insecure registry
+      --insecure   Allow push to an insecure registry
   -p, --purge      Remove the local manifest list after push
 ```
 
@@ -108,7 +108,7 @@ The manifest command interacts solely with a Docker registry. Because of this, i
 
 ## Examples
 
-### inspect an image's manifest object
+### Inspect an image's manifest object
  
 ```bash
 $ docker manifest inspect hello-world
@@ -141,7 +141,7 @@ without a tag, or by digest (e.g. hello-world@sha256:f3b3b28a45160805bb16542c953
 Here is an example of inspecting an image's manifest with the `--verbose` flag:
 
 ```bash
-$ docker manifest inspect -v hello-world
+$ docker manifest inspect --verbose hello-world
 {
         "Ref": "docker.io/library/hello-world:latest",
         "Digest": "sha256:f3b3b28a45160805bb16542c9531888519430e9e6d6ffc09d72261b0d26ff74f",