Improving README a little bit

README.md

@@ -2,19 +2,19 @@ OpenMC Notebooks
 ----------------
 
 This repository contains a set of example Jupyter notebooks demonstrating
-various capabilities in OpenMC from model building to advanced features like
-depletion/activation and CAD geometry.
+various capabilities in OpenMC from basic model building to advanced features
+such as depletion/activation, CAD geometry universes, etc.
 
 Notebook versioning
 -------------------
 
-Notebooks contained in the `main` branch of this repository should work with the
-latest version of OpenMC. Note, `main` **is not the default branch of this
-repository** and must be checked out after cloning the repo.
+Notebooks contained in the `main` branch of this repository can be expected to
+work with the latest release of OpenMC. Note, `main` **is not the default branch
+of this repository** and must be checked out after cloning the repo.
 
-Previous versions of the notebooks will be tagged with the corresponding OpenMC
-version with which they work. These tags can be used to checkout notebooks
-ensured to be compatible with the corresponding release of OpenMC.
+Previous versions notebooks will be tagged with the corresponding OpenMC version
+with which they are expected to work. These tags can be used to checkout
+notebooks ensured to be compatible with the corresponding release of OpenMC.
 
 Continuous development of these notebooks occurs in the `develop` branch, the
 default branch of this repository. We ask that any updates or contributions to