doc: Minor fix.

wiki/src/doc/first_steps/persistence/warnings.mdwn

@@ -9,9 +9,9 @@ Storing Sensitive Documents
 stick can know that there is a persistent storage on it. Take into consideration
 that you can be forced or tricked to give out its passphrase.
 
-Remember also that **secure deletion does not work as expected on USB sticks.**<br/>
+Note also that **secure deletion do not work as expected on USB sticks.**<br/>
 [[See the corresponding documentation.|encryption_and_privacy/secure_deletion#index2h1]]
-Read how to [[delete the persistent storage|delete]] instead.
+Read also how to [[delete the persistent storage|delete]].
 
 Overwriting Configurations
 ==========================