Write 'partition (or entire disk)' (#15670)

It was very clear to P4 that 'partition' didn't apply to her scenario in
Mission 3 because she was trying to unlock an entire disk and not only a
partition of it.

wiki/src/doc/encryption_and_privacy/veracrypt.mdwn

@@ -47,7 +47,7 @@ encrypted in two different kinds of *volumes*:
 - *File containers*. A file container is a single big file inside which you can
   store several files encrypted, a bit like a ZIP file.
 
-- *Partitions*. Usually USB sticks and hard disks have a single
+- *Partitions (or entire disk)*. 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 encrypted a whole USB stick for example.
 
@@ -198,13 +198,13 @@ Closing a file container
 
    [[!img eject-container.png link="no" alt=""]]
 
-Using a partition
-=================
+Using a partition (or entire disk)
+==================================
 
 <a id="partition-files"></a>
 
-Unlocking a partition without keyfiles
---------------------------------------
+Unlocking a partition (or entire disk) without keyfiles
+-------------------------------------------------------
 
 1. Choose
    <span class="menuchoice">
@@ -216,7 +216,7 @@ Unlocking a partition without keyfiles
 1. Plug in the USB stick or the hard disk which has the partition.
 
    If your partition is on an internal hard disk, refer to [[Unlocking a
-   partition with keyfiles|veracrypt#partition-disks]]
+   partition (or entire disk) with keyfiles|veracrypt#partition-disks]]
    instead.
 
 1. Click on the <span class="guilabel">Encrypted</span> label of the new volume
@@ -233,14 +233,15 @@ Unlocking a partition without keyfiles
 
 <a id="partition-disks"></a>
 
-Unlocking a partition with keyfiles
------------------------------------
+Unlocking a partition (or entire disk) with keyfiles
+----------------------------------------------------
 
 1. If your partition is on an internal hard disk, [[set up an administration
    password|doc/first_steps/startup_options/administration_password]] when
    starting Tails.
    
-   Otherwise, plug in the USB stick or the hard disk which has the partition.
+   Otherwise, plug in the USB stick or the hard disk that you want to
+   unlock or which has the partition.
 
 1. Choose
    <span class="menuchoice">
@@ -282,8 +283,8 @@ Unlocking a partition with keyfiles
 
 1. Your volume opens in <span class="application">Files</span>.
 
-Closing a partition
--------------------
+Closing a partition (or entire disk)
+------------------------------------
 
 1. Click on the <span class="button">[[!img lib/media-eject.png
    alt="Eject" class="symbolic" link="no"]]</span> button on the label