Fixed typo (#623)

docs/docs/basic-usage.md

@@ -163,7 +163,7 @@ or create a brand new one for you to always work isolated from your global Pytho
     To easily switch between Python versions, it is recommended to
     To easily switch between Python versions, it is recommended to
     use [pyenv](https://github.com/pyenv/pyenv) or similar tools.
     use [pyenv](https://github.com/pyenv/pyenv) or similar tools.
     
     
-    For instance, if you project is Python 2.7 only, a standard workflow
+    For instance, if your project is Python 2.7 only, a standard workflow
     would be:
     would be:
     
     
     ```bash
     ```bash