Add watchdog entry when module is activated and inactivated

+++ b/email_verify.admin.inc
@@ -119,14 +119,21 @@ function email_verify_admin_settings($form, &$form_state) {
 
 /**
  * Form submit function.
+ *
+ * This runs the module verification check, if activating, and logs whether the
+ * module was activated or inactivated.
  */
 function email_verify_admin_settings_submit($form, &$form_state) {
   // Enable/disable mail sending subsystem.
   if ($form_state['values']['email_verify_active']) {
     if (!email_verify_activated()) {
       email_verify_enable_module();
+      watchdog('email_verify', 'The Email Verify module was activated.');
     }
   }
+  elseif (email_verify_activated()) {
+    watchdog('email_verify', 'The Email Verify module was inactivated.');
+  }
 }

I'm confused as to why this is here. How can the module be disabled if we are submitting its settings form?

Testing the patch in comment #3, prior to adding the patch there were no watchdog entries for the module being activated or inactivated at /admin/config/system/email_verify.

After adding the patch, there were watchdog entries for the module being activated and inactivated.

This has passed testing.

Thanks!