formatting for contributing.md

CONTRIBUTING.md

@@ -1,15 +1,17 @@
-# Contribute to freqtrade
+# Contributing
+
+## Contribute to freqtrade
 
 Feel like our bot is missing a feature? We welcome your pull requests! Few pointers for contributions:
 
 - Create your PR against the `develop` branch, not `master`.
 - New features need to contain unit tests and must be PEP8 
+
 conformant (max-line-length = 100).
 
 If you are unsure, discuss the feature on our [Slack](https://join.slack.com/t/highfrequencybot/shared_invite/enQtMjQ5NTM0OTYzMzY3LWMxYzE3M2MxNDdjMGM3ZTYwNzFjMGIwZGRjNTc3ZGU3MGE3NzdmZGMwNmU3NDM5ZTNmM2Y3NjRiNzk4NmM4OGE)
 or in a [issue](https://github.com/freqtrade/freqtrade/issues) before a PR.
 
-
 **Before sending the PR:**
 
 ## 1. Run unit tests
@@ -17,27 +19,34 @@ or in a [issue](https://github.com/freqtrade/freqtrade/issues) before a PR.
 All unit tests must pass. If a unit test is broken, change your code to 
 make it pass. It means you have introduced a regression.
 
-**Test the whole project**
+### Test the whole project
+
 ```bash
 pytest freqtrade
 ```
 
-**Test only one file**
+### Test only one file
+
 ```bash
 pytest freqtrade/tests/test_<file_name>.py
 ```
 
-**Test only one method from one file**
+### Test only one method from one file
+
 ```bash
 pytest freqtrade/tests/test_<file_name>.py::test_<method_name>
 ```
 
 ## 2. Test if your code is PEP8 compliant
-**Install packages** (If not already installed)
+
+### Install packages
+
 ```bash
 pip3.6 install flake8 coveralls
-``` 
-**Run Flake8**
+```
+
+### Run Flake8
+
 ```bash
 flake8 freqtrade
 ```
@@ -49,13 +58,13 @@ Guide for installing them is [here](http://flake8.pycqa.org/en/latest/user/using
 
 ## 3. Test if all type-hints are correct
 
-**Install packages** (If not already installed)
+### Install packages 
 
 ``` bash
 pip3.6 install mypy
 ```
 
-**Run mypy**
+### Run mypy
 
 ``` bash
 mypy freqtrade