fixed a typo..

docs/How to contribute.rst

@@ -1,12 +1,11 @@
 How to contribute
 =================
 
-If you want to contribute to the documentation access the "docs" directory
-in the repository https://github.com/VirtualDataLab/smobsc or simply chlick
+If you want to contribute to the documentation, access the "docs" directory
+in the repository: https://github.com/VirtualDataLab/smobsc or simply click
 the "edit on github" button on the top of this page. In the docs directory
-you will find an index.rst file. This is basically where you see the main 
-structure of the documentation with all the headers, subheaders etc. 
+you will find an index.rst file. This is basically where you see the main
+structure of the documentation with all the headers, subheaders etc.
 If you want to link to a new section, you have to add it under toctree.
-When building the documentation sphinx will go through the sections under 
-toctree and look for .rst files with the same names in the docs directory. 
-
+When building the documentation sphinx will go through the sections under
+toctree and look for .rst files with the same names in the docs directory.