Fix example

It would be possible to encrypt the whole USB stick even if the stick
were not split into partitions.

wiki/src/doc/encryption_and_privacy/veracrypt.mdwn

@@ -50,7 +50,7 @@ several files encrypted, a bit like a ZIP file.</p>
 <div class="text">
 <p>Usually, USB sticks and hard disks have a single partition of their
 entire size. But, they can also be split into several partitions. This way,
-you can encrypt a whole USB stick, for example.</p>
+you can encrypt only part of a USB stick, for example.</p>
 </div>
 </div>