Removed python, not an Aline4Cloud dependency

Author: laurentganne

docs/install/install_a4c.md

@@ -5,7 +5,7 @@ It provides a catalog of components and application templates and can rely on Yo
 Yorc provides a plugin so that Alien4Cloud can interact with the orchestrator.
 
 First you need to install Alien4Cloud. Yorc 3.0.1 requires Alien4Cloud 2.0.0.
-You can either install manually Alien4Cloud dependencies python, curl, java 8 as described
+You can either install manually Alien4Cloud dependencies, curl and java 8, as described
 in [ALien4Cloud 2.0.0 Getting Started guide](https://alien4cloud.github.io/#/documentation/2.0.0/getting_started/new_getting_started.html),
 or use the docker image `alien4cloud/alien4cloud:2.0.0` available on [Docker Hub](https://hub.docker.com/r/alien4cloud/alien4cloud/).