PR geerlingguy#506 docs cleanup.

Author: geerlingguy

README.md

@@ -204,8 +204,9 @@ On Ubuntu, the package names are named differently, so the `mysql_package` varia
 
 ## Dependencies
 
-None for ansible installations.
-Collection `community.mysql` for ansible-core only installations (You need to manually require it in your `collections/requirements.yml`).
+If you have `ansible` installed (e.g. `pip3 install ansible`), none.
+
+If you have only installed `ansible-core`, be sure to require `community.mysql` in your `collections/requirements.yml` or install it manually with `ansible-galaxy collection install community.mysql`.
 
 ## Example Playbook