Bug#422552: Minor typos and wording suggestions

[Russ Allbery <rra@stanford.edu>]

I generally agree with Ian that several of the changes proposed here don't
seem clearly better to me.  A few others have already been made, namely:

> Michael Tautschnig writes ("Bug#422552: Minor typos and wording suggestions"):

>> - Page 8, 2.5 Priorities, Paragraph on "required": s/Removing an
>>   required/Removing a required/

>> - Page 39, 6.1, second paragraph: ... and must not be not
>>   world-writable; either this is a major error as it means that the
>>   files _must be_ world-writable, or it should be reworded to must
>>   be world-writable. Then it would deserve some explanation because
>>   usually one would never want world-writable scripts.

The remaining one that was uncontroversial is:

>> - Page 40, 6.2, heading: Maintainer scripts Idempotency -
>>   idempotency should be lowercase here.

I'm making this change in my arch repository.  Thank you very much for the
proofreading!

-- 
Russ Allbery (rra@stanford.edu)             <http://www.eyrie.org/~eagle/>