Testing creation of installation.rst

This is the creation of one installation which has copy pasted code

doc/installation.rst

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+================
+Installation
+================
+
+This project can be installed by cloning the repository preceded by other steps that assist installing 
+
+  https://github.com/HybriD3-database/MatD3
+
+It's a public project, so anybody is able to clone the source code and create issues and merge requests. In order to contribute to the project directly, contact one of the MatD\ :sup:`3` team members who will then grant you the developer status. For pull/push privileges you must upload your RSA public key to GitHub. If you already have one, it is likely located at ``~/.ssh/id_rsa.pub``. If not, the RSA public/private key pair can be generated by issuing
+
+.. code:: bash
+
+  ssh-keygen
+
+It is sufficient to press enter at each query until the keys have been generated. However, protecting the key with a password would be a good idea if you intend to keep it on a public server. Then, at the GitHub website, go to your settings, find "SSH keys", and enter the public key. You can upload several keys in order to have pull/push access from more than one computer. 
+
+From a command line prompt (i.e., using a terminal application, which is usually provided along with any Unix/Linux distribution or with MacOS), you can now clone the Git repository with
+
+.. code:: bash
+
+  git clone https://github.com/HybriD3-database/MatD3.git
+
+The result of this command should be the creation of a directory ``MatD3`` that contains the software needed to operate the MatD3 database.