Update installation.rst

docs/installation.rst

@@ -3,15 +3,9 @@ Installation
 
 Addisnano is a Deep Tensor Learing Neural Network to the prediction of potential energy surfaces and other quantum-chemical properties of molecules and materials in atomistic system. It contains basic building blocks of atomistic neural networks, manages their training and provides simple access to common benchmark datasets. This allows for an easy implementation and evaluation of new models.
 
-We can install the application with pip as:
+We can install the application with pip as::
 
-```
-pip install addisnano
-```
+    1. $ pip install addisnano
 
-or 
+     2.$ conda install -c conda-forge addisnano
 
-
-```
-conda install -c conda-forge addisnano
-```