The etc and dot is seprated

Signed-off-by: YuPengZTE <yu.peng36@zte.com.cn>

docs/installation/linux/gentoolinux.md

@@ -50,7 +50,7 @@ IRC channel on the Freenode network.
 | btrfs         |         |Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.|
 | contrib       |  Yes    |Install additional contributed scripts and components.|
 | device-mapper |  Yes    |Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.|
-| doc           |         |Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally.|
+| doc           |         |Add extra documentation, such as API and Javadoc. It is recommended to enable per package instead of globally.|
 | vim-syntax    |         |Pulls in related vim syntax scripts.|
 | zsh-completion|         |Enable zsh completion support.|
 

docs/security/security.md

@@ -136,7 +136,7 @@ Finally, if you run Docker on a server, it is recommended to run
 exclusively Docker in the server, and move all other services within
 containers controlled by Docker. Of course, it is fine to keep your
 favorite admin tools (probably at least an SSH server), as well as
-existing monitoring/supervision processes (e.g., NRPE, collectd, etc).
+existing monitoring/supervision processes, such as NRPE and collectd.
 
 ## Linux kernel capabilities
 

docs/userguide/eng-image/dockerfile_best-practices.md

@@ -238,12 +238,12 @@ keep the image size down. Since the `RUN` statement starts with
 The `CMD` instruction should be used to run the software contained by your
 image, along with any arguments. `CMD` should almost always be used in the
 form of `CMD [“executable”, “param1”, “param2”…]`. Thus, if the image is for a
-service (Apache, Rails, etc.), you would run something like
+service, such as Apache and Rails, you would run something like
 `CMD ["apache2","-DFOREGROUND"]`. Indeed, this form of the instruction is
 recommended for any service-based image.
 
-In most other cases, `CMD` should be given an interactive shell (bash, python,
-perl, etc), for example, `CMD ["perl", "-de0"]`, `CMD ["python"]`, or
+In most other cases, `CMD` should be given an interactive shell, such as bash, python
+and perl. For example, `CMD ["perl", "-de0"]`, `CMD ["python"]`, or
 `CMD [“php”, “-a”]`. Using this form means that when you execute something like
 `docker run -it python`, you’ll get dropped into a usable shell, ready to go.
 `CMD` should rarely be used in the manner of `CMD [“param”, “param”]` in