Further tweak on evidence of completion

Signed-off-by: David A. Wheeler <[email protected]>

secure_software_development_fundamentals.md

@@ -145,7 +145,7 @@ Our primary concern is that you learn how to develop *secure* software. Here are
 
 3. **Open Content**. The main informational material is not just “free” in the sense of “no cost” but also in terms of freedom. In particular, the informational content is released under the [Creative Commons Attribution License (CC-BY) version 4.0](https://creativecommons.org/licenses/by/4.0/), so you can reuse it in many ways. We *want* you to use this information! There are some exceptions; we quote other material (such as from xkcd) which are under their own licenses.
 
-4. **Evidence of Completion**. If you want to prove that you learned the material (as opposed to simply seeing some text), that is available. On edX this is available at a nominal price by enrolling in a verified track. On the Linux Foundation training platform you can try to pass a final exam to complete the course and obtain a certificate of completion that also gives a digital badge; you can share that via social media, including your LinkedIn profile. This might really help you communicate what you know to employers, customers, or potential employers. By comparison, just owning a book doesn’t prove that you have read or understood it.
+4. **Evidence of Completion**. If you want to prove that you learned the material (as opposed to simply seeing some text), that is available. Learners taking the course on the Linux Foundation training platform will be required to pass a final exam in order to complete the course; they will obtain a certificate of completion and will also get a digital badge, which can be shared via social media to showcase their knowledge. On edX this evidence of completion is available at a nominal price by enrolling in a verified track. This might really help you communicate what you know to employers, customers, or potential employers. By comparison, just owning a book doesn’t prove that you have read or understood it.
 
 5. **Accessibility**. We have worked to make this information accessible. We want to make sure that those who are blind, have low vision, color-blindness, and so on can learn from this material.