Merge pull request #347 from IlyaPechersky/enumerate-steps

Add the specific contribution steps in order in the README

README.md

@@ -109,37 +109,38 @@ make REPO=yegor256/tojos
 
 ## How to Contribute (e.g. by adding a new metric)
 
-If you want to add a new metric to the script, fork a repository and
-create a new file in the `metrics/` directory, using one of
-the existing files as an example.
-Then, create a test for your metric, in the `tests/metrics/` directory.
+For example, you want to add a new metric to the script:
 
-Then, run the entire test suite
-(this should take a few minutes to complete, without errors):
+1. Fork a repository.
+2. Create a new file in the `metrics/` directory,
+using one of the existing files as an example.
+3. Create a test for your metric, in the `tests/metrics/` directory.
+4. Run the entire test suite
+    (this should take a few minutes to complete, without errors):
 
-```bash
-sudo make install
-sudo make test lint
-```
+    ```bash
+    sudo make install
+    sudo make test lint
+    ```
 
-Then, send us a
-[pull request](https://www.yegor256.com/2014/04/15/github-guidelines.html).
-We will review your changes and apply them to the `master` branch shortly,
-provided they don't violate our quality standards.
+    -You can also test it with Docker:
 
-You can also test it with Docker:
+    ```bash
+    docker build . -t cam
+    docker run --rm cam make test
+    ```
 
-```bash
-docker build . -t cam
-docker run --rm cam make test
-```
+    There is even a faster way to run all tests, with the help of Docker,
+    if you don't change any installation scripts:
 
-There is even a faster way to run all tests, with the help of Docker,
-if you don't change any installation scripts:
+    ```bash
+    docker run -v $(pwd):/c --rm yegor256/cam:0.9.2 make -C /c test
+    ```
 
-```bash
-docker run -v $(pwd):/c --rm yegor256/cam:0.9.2 make -C /c test
-```
+5. Send us a
+[pull request](https://www.yegor256.com/2014/04/15/github-guidelines.html).
+We will review your changes and apply them to the `master` branch shortly,
+provided they don't violate our quality standards.
 
 ## How to Calculate Additional Metrics