Minor user guide fixes

[emilypi at cohomolo.gy]

gonna be completely honest - i appreciate the patches but i'm not going to go through the labor of applying something this trivial. Unless not using Github is a conscientious protest against ICE or their military contracts or the like , i'm liable to just reject email patches that are not security related or critical fixes on policy grounds.

> On May 28, 2022, at 2:23 PM, Mikolaj Konarski <mikolaj at well-typed.com> wrote:
> 
> Here you go:
> 
> https://github.com/haskell/cabal/pull/8176
> 
> If there are review comments, I guess I will be copying them
> in emails to you and you will be sending me replies and new
> commits to paste into the pull request?
> 
> All the best,
> Mikolaj
> 
>> On Sat, May 28, 2022 at 8:55 PM Vilius Panevėžys <vp at mikrovisata.net> wrote:
>> 
>> Hi Mikolaj,
>> thank you for the prompt reply!
>> 
>> On Sat, 28 May 2022 17:10:24 +0200
>> Mikolaj Konarski <mikolaj at well-typed.com> wrote:
>> 
>>> Would you like to create a pull request on github with these changes
>>> to help us see them in context, e.g., whether they merge cleanly and
>>> which branch, and to help us credit you properly?
>> 
>> I don't use GitHub, so I hope it's not too much trouble to just `git
>> am` the patches. I've rebased the patches on master today, so they
>> should apply cleanly. However, if it turns out you need me to make any
>> revision - let me know.
>> 
>> My appreciation goes to all the people who have put in the time and
>> effort into creating the user guide (not to mention Cabal itself!).
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