Patch by inclement.

Revised re by Serhiy Storchaka.

"w" and "x" now are relative to the start of the file.

"w" and "x" now are relative to the start of the file.

"w" and "x" now are relative to the start of the file.

* Document how comparison of UUID objects work
* Document str(uuid) returns the braceless standard form
* Add a test for comparison of a UUID object with a non-UUID object

Patch by Ammar Askar.

* Wrong parameter name, 'group_by' instead of 'key_type'
* Don't round up numbers when explaining the examples. If they exactly match
  what can be read in the script output, it is to easier to understand
  (4.8 MiB vs 4855 KiB)
* Fix incorrect method link that was pointing to another module

Patch written by Loic Pefferkorn.