subscriptions: include diff link in plain-text list mails too

Fixes the docblock of lastRevBefore() and extends the diff link added to
the HTML list mail to the plain-text variant as well, so both f

subscriptions: include diff link in plain-text list mails too

Fixes the docblock of lastRevBefore() and extends the diff link added to
the HTML list mail to the plain-text variant as well, so both formats
stay in sync.

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updated rector and applied it

subscriptions: include diff link with each page in 'list' mails

mark nullable types explicitly

PHP 8.4 will throw a warning where type hints without a ?prefix are used
and nullable parameters can be passed.

I'm not sure if I found all occurances, but we still r

mark nullable types explicitly

PHP 8.4 will throw a warning where type hints without a ?prefix are used
and nullable parameters can be passed.

I'm not sure if I found all occurances, but we still rarely use type
hints, so it might not be many indeed.

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Use str_starts_with/str_ends_with

code style: line breaks

code style: operator spacing

coding style: control flow line breaks

update some plugin classes in phpdocs, reformatting

recover comments in list

codestyle adjustments: class declaration braces

Apply rector renames

Apply rector fixes to inc/Subscriptions

fix accidental overwriting of variable in bulkmailer #3862

When the bulkmailer tries to skip own or minor edits, it was overwriting
$rev with a timestamp instead of using the proper array structure

fix accidental overwriting of variable in bulkmailer #3862

When the bulkmailer tries to skip own or minor edits, it was overwriting
$rev with a timestamp instead of using the proper array structure
returned by getRevisionInfo().

This also moves the initialization of the PageChangeLog object out of
the while loop to ensure it's inner caching mechanism is utilized when
fetching the info.

This should fix #3862

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avoid warning for new subscribers

When a subscriber never received an email no last sent timestamp is set.
PHP8 threw a warning on a missing array key, there.

coding style of functions using ChangeLog