Update per linter

docs/playbook-examples.md

@@ -2,7 +2,7 @@
 
 [Back to README.md](../README.md)
 
-The following examples show overriding values from the command line. Typically it will be easier to define these in the inventory or host_var instead.
+The following examples show overriding values from the command-line. Typically it will be easier to define these in the inventory or host_var instead.
 
 The `zfs_on_root.yml` referenced in examples below is a simple yaml file used to call the role, which can look like this: