Fix some flaws in man.

Signed-off-by: Jian Zhang <zhangjian.fnst@cn.fujitsu.com>

man/docker-cp.1.md

@@ -20,7 +20,7 @@ You can copy from the container's file system to the local machine or the
 reverse, from the local filesystem to the container. If `-` is specified for
 either the `SRC_PATH` or `DEST_PATH`, you can also stream a tar archive from
 `STDIN` or to `STDOUT`. The `CONTAINER` can be a running or stopped container.
-The `SRC_PATH` or `DEST_PATH` be a file or directory.
+The `SRC_PATH` or `DEST_PATH` can be a file or directory.
 
 The `docker cp` command assumes container paths are relative to the container's 
 `/` (root) directory. This means supplying the initial forward slash is optional; 
@@ -82,7 +82,7 @@ It is not possible to copy certain system files such as resources under
 Using `-` as the `SRC_PATH` streams the contents of `STDIN` as a tar archive.
 The command extracts the content of the tar to the `DEST_PATH` in container's
 filesystem. In this case, `DEST_PATH` must specify a directory. Using `-` as
-`DEST_PATH` streams the contents of the resource as a tar archive to `STDOUT`.
+the `DEST_PATH` streams the contents of the resource as a tar archive to `STDOUT`.
 
 # OPTIONS
 **-L**, **--follow-link**=*true*|*false*

man/docker-events.1.md

@@ -39,7 +39,7 @@ and Docker images will report:
 
 The `--since` and `--until` parameters can be Unix timestamps, date formatted
 timestamps, or Go duration strings (e.g. `10m`, `1h30m`) computed
-relative to the client machine’s time. If you do not provide the --since option,
+relative to the client machine’s time. If you do not provide the `--since` option,
 the command returns only new and/or live events.  Supported formats for date
 formatted time stamps include RFC3339Nano, RFC3339, `2006-01-02T15:04:05`,
 `2006-01-02T15:04:05.999999999`, `2006-01-02Z07:00`, and `2006-01-02`. The local

man/docker-import.1.md

@@ -39,7 +39,7 @@ Import to docker via pipe and stdin:
 
     # cat exampleimage.tgz | docker import - example/imagelocal
 
-Import with a commit message 
+Import with a commit message. 
 
     # cat exampleimage.tgz | docker import --message "New image imported from tarball" - exampleimagelocal:new
 

man/docker-network-ls.1.md

@@ -89,7 +89,7 @@ NETWORK ID          NAME                DRIVER
 You can also filter for a substring in a name as this shows:
 
 ```bash
-$ docker ps --filter name=foo
+$ docker network ls --filter name=foo
 NETWORK ID          NAME                DRIVER
 95e74588f40d        foo                 bridge
 06e7eef0a170        foobar              bridge
@@ -99,8 +99,8 @@ NETWORK ID          NAME                DRIVER
 
 The `id` filter matches on all or part of a network's ID.
 
-The following filter matches all networks with a name containing the
-`06e7eef01700` string.
+The following filter matches all networks with an ID containing the
+`63d1ff1f77b0...` string.
 
 ```bash
 $ docker network ls --filter id=63d1ff1f77b07ca51070a8c227e962238358bd310bde1529cf62e6c307ade161
@@ -108,14 +108,14 @@ NETWORK ID          NAME                DRIVER
 63d1ff1f77b0        dev                 bridge
 ```
 
-You can also filter for a substring in a ID as this shows:
+You can also filter for a substring in an ID as this shows:
 
 ```bash
-$ docker ps --filter id=95e74588f40d
+$ docker network ls --filter id=95e74588f40d
 NETWORK ID          NAME                DRIVER
 95e74588f40d        foo                 bridge
 
-$ docker ps --filter id=95e
+$ docker network ls --filter id=95e
 NETWORK ID          NAME                DRIVER
 95e74588f40d        foo                 bridge
 ```

man/docker-network-rm.1.md

@@ -20,7 +20,7 @@ To remove the network named 'my-network':
 ```
 
 To delete multiple networks in a single `docker network rm` command, provide
-multiple network names or id's. The following example deletes a network with id
+multiple network names or ids. The following example deletes a network with id
 `3695c422697f` and a network named `my-network`:
 
 ```bash