doc: cleaning up the readme.md

Cleaning up the language and formatting in the
README.md document file.

Signed-off-by: Pekka Niskanen <pekka.niskanen@nordicsemi.no>

Author: peknis

README.md

@@ -1,7 +1,7 @@
 # Zephyr Example Application
 
 This repository contains a Zephyr example application. The main purpose of this
-repository is to serve as a reference on how to structure Zephyr based
+repository is to serve as a reference on how to structure Zephyr-based
 applications. Some of the features demonstrated in this example are:
 
 - Basic [Zephyr application][app_dev] skeleton
@@ -17,9 +17,9 @@ applications. Some of the features demonstrated in this example are:
 This repository is versioned together with the [Zephyr main tree][zephyr]. This
 means that every time that Zephyr is tagged, this repository is tagged as well
 with the same version number, and the [manifest](west.yml) entry for `zephyr`
-will point to the corresponding Zephyr tag. For example, `example-application`
-v2.6.0 will point to Zephyr v2.6.0. Note that the `main` branch will always
-point to the development branch of Zephyr, also `main`.
+will point to the corresponding Zephyr tag. For example, the `example-application`
+v2.6.0 will point to Zephyr v2.6.0. Note that the `main` branch always
+points to the development branch of Zephyr, also `main`.
 
 [app_dev]: https://docs.zephyrproject.org/latest/develop/application/index.html
 [workspace_app]: https://docs.zephyrproject.org/latest/develop/application/index.html#zephyr-workspace-app
@@ -33,14 +33,14 @@ point to the development branch of Zephyr, also `main`.
 ## Getting Started
 
 Before getting started, make sure you have a proper Zephyr development
-environment. You can follow the official
+environment. Follow the official
 [Zephyr Getting Started Guide](https://docs.zephyrproject.org/latest/getting_started/index.html).
 
 ### Initialization
 
 The first step is to initialize the workspace folder (``my-workspace``) where
-the ``example-application`` and all Zephyr modules will be cloned. You can do
-that by running:
+the ``example-application`` and all Zephyr modules will be cloned. Run the following
+command:
 
 ```shell
 # initialize my-workspace for the example-application (main branch)
@@ -50,26 +50,29 @@ cd my-workspace
 west update
 ```
 
-### Build & Run
+### Building and running
 
-The application can be built by running:
+To build the application, run the following command:
 
 ```shell
 west build -b $BOARD app
 ```
 
-where `$BOARD` is the target board. The `custom_plank` board found in this
-repository can be used. Note that Zephyr sample boards may be used if an
+where `$BOARD` is the target board.
+
+You can use the `custom_plank` board found in this
+repository. Note that Zephyr sample boards may be used if an
 appropriate overlay is provided (see `app/boards`).
 
-A sample debug configuration is also provided. You can apply it by running:
+A sample debug configuration is also provided. To apply it, run the following
+command:
 
 ```shell
 west build -b $BOARD app -- -DOVERLAY_CONFIG=debug.conf
 ```
 
-Note that you may also use it together with `rtt.conf` if using Segger RTT. Once
-you have built the application you can flash it by running:
+You can also use it together with the `rtt.conf` file if using Segger RTT. Once
+you have built the application, run the following command to flash it:
 
 ```shell
 west flash