docs: Fix typos and add missing preferences in libraries/email.rst

[obozdag]

Description
Fix typos and add missing preferences in libraries/email.rst

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[obozdag]

@kenjis What kind of rework does it need? Should I remove $recipients or $ marks or both?

[kenjis]

@obozdag Yes.

[kenjis]

Please remove all $ marks in Preference.
Because these items may be keys in an array.

[obozdag]

@kenjis I have removed all $ marks in Preference.
In https://codeigniter4.github.io/CodeIgniter4/libraries/cookies.html#cookie-personalization there are $ marks and they can be keys in the defaults array. So, shall I also remove the $ marks there?

[kenjis]

@obozdag Thank you!

In https://codeigniter4.github.io/CodeIgniter4/libraries/cookies.html#cookie-personalization there are $ marks and they can be keys in the defaults array. So, shall I also remove the $ marks there?

I'm not sure. Because the description for the table is:

However, you may wish to define your own settings by changing the following settings in the Config\Cookie class in app/Config/Cookie.php file.

So it clearly indicates that the table explains properties in Config\Cookie.
But yes, the items are also array keys for Cookie::setDefaults().

[paulbalandan]

I think I mean here when I made the table is it is referring to the properties of Config\Cookie so the $ should be preserved. The array keys to Cookie::$defaults are private implementation details.

[kenjis]

@obozdag Thank you!