Polish up `dd` a little more

sheets/dd

@@ -1,5 +1,8 @@
-# Read from {/dev/urandom} 2*512 Bytes and put it into {/tmp/test.txt}
-# Note: both iterations each read 512 Bytes (the selected block size).
+# dd
+# Convert and copy a file (AKA: Destroyer of Disks)
+
+# Read from `/dev/urandom`, 2*512 Bytes, and put it into `/tmp/test.txt`.
+# Note: each iteration reads 512 bytes (the selected block size).
 dd if=/dev/urandom of=/tmp/test.txt count=2 bs=512
 
 # Watch the progress of dd(1).
@@ -20,10 +23,10 @@ done
 # installed with the following command: apt-get install pv zenity
 (
     pv -n /dev/zero | dd of=/dev/null bs=128M conv=notrunc,noerror
-) 2>&1 | zenity --title 'Running dd command (cloning), please wait...' --progress
+) 2>&1 | zenity --title 'Cloning with dd(1) -- please wait...' --progress
 
 # Watch the progress of dd(1) with the built-in `progress` functionality, -
-# introduced in coreutils v8.24.
+# introduced in CoreUtils v8.24.
 dd if=/dev/zero of=/dev/null bs=128M status=progress
 
 # DD with "graphical" return