Typo fix.

Author: ozgunbabur

README.md

@@ -1,17 +1,17 @@
 # causal-priors-extractor ![build status](https://github.com/pathwayanddataanalysis/causal-priors-extractor/workflows/build/badge.svg)
 This project extracts causal priors from Pathway Commons database to use in CausalPath.
 
-##Inputs 
+## Inputs 
 
 1. A BioPAX file downloaded from Pathway Commons. See https://www.pathwaycommons.org/archives/PC2/
 
 2. A blacklist file that provides a classification for ubiquitous small molecules. This file appears in the name "blacklist.txt" in the Pathway Commons archives.
 
-##Output
+## Output
 
 Causal priors as a SIF file.
 
-##How to build with Maven
+## How to build with Maven
 ```
 git pull https://github.com/PathwayAndDataAnalysis/causal-priors-extractor.git
 cd causal-priors-extractor