Tests: update method signatures

test: slightly improve mail body test

replacing sleep with waitForTick should make the test faster, this also tests that we have the
correct summary in the mail

fix: don't prevent creator from a new page's metadata ��

Calling pageinfo() durint IO_WIKIPAGE_WRITE of newly created pages
caused the page's metadata file to be written prematurely which in turn
ca

fix: don't prevent creator from a new page's metadata ��

Calling pageinfo() durint IO_WIKIPAGE_WRITE of newly created pages
caused the page's metadata file to be written prematurely which in turn
caused the creator to be omitted from the page's metadata.

This reworks the create_mail_body action to no longer call pageinfo().

See also splitbrain/dokuwiki#2401

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Fix and refactor dir handling

Use correct links in every environment

credit issue splitbrain/dokuwiki#1315

Fix coverage information

Parametrize test and add more cases

Test methods from helper class

Fix wrong username when sending approve mail.

Store mail templates in extra files

Fix wrong language in comment and rename function

Code cleanup for phpcs and add phpdocs

Reduce signature of create_mail_body

Only the action string is actually necessary.

Handle body creation both for change and approve

The mail-bodies for change and approval mails are very similar and can
be handled in one method. Using an extra method for this text creation
makes i

Handle body creation both for change and approve

The mail-bodies for change and approval mails are very similar and can
be handled in one method. Using an extra method for this text creation
makes it easier to test.

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Add test for change mail body

Finish diff-link test

Update tests

Fixed existing tests and added some for mail

Implemented workaround for Issue splitbrain/dokuwiki#1099

Add general and start specific tests