update metadata of changed page in PageFile class

fix typo

set default size for embedded SVGs

many templates fail to set proper sizes for admin icons etc. This will
prevent SVGs from blowing up by default - of course templates should
still overwrite this de

set default size for embedded SVGs

many templates fail to set proper sizes for admin icons etc. This will
prevent SVGs from blowing up by default - of course templates should
still overwrite this default.

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saveWikiText() unittest 5

5.1 create a page
5.2 external edit
5.3 edit and save
5.4 delete
5.5 create a page, second time
5.6 externally delete
5.7 create a page, third time

saveWikiText() unittest 3.3

second to last revision check after repeated external edit

saveWikiText() unittest 4

4.1 externally create a page
4.2 edit and save
4.3 externally edit (file older than last rev)

PHP8: check array key existence

remove page key from event data prior to return

$data['page'] is object $this, it is not possible to access the object after destructed.

fix Undefined variable $id

implement PageFile class

PageFile class handles wiki text file and its change management for specific page, main part comes from `function saveWikiText()`. This ensures and enables to use one **Pag

implement PageFile class

PageFile class handles wiki text file and its change management for specific page, main part comes from `function saveWikiText()`. This ensures and enables to use one **PageChangeLog** instance during a page save process among class methods and relevant plugins.

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remove goto-loop structure

plugin event handler should set correct changeType.

group assertions for saveWikiText()

avoid doubling line in logviewer. fixes #3554

set current revision date 1sec before now for external deletion

in preparation for possible new page save

translation update

update saveWikiText()

allow plugin that provides alternative policy for handling external edits in changelog

much better greek (el) translations

rigorous COMMON_WIKIPAGE_SAVE

ignore wrong changes in id and file data caused by event handlers

use time() for revision date of externally deleted page

also, code doc updates

rename saveRevisionInfo to cacheRevisionInfo

move hasRevision() to trait

removed wrong test

See
https://github.com/splitbrain/dokuwiki/pull/3272#issuecomment-966367900
for reasoning

fix fallback implementation for resolve_pageid()

When an empty link was given, the old implementation fell back to $ID,
this was handled incorrectly in the deprecated method.

simplify relative resolver and add tests

make resolveStartPage easier to understand

This dosn't really change the behaviour but makes the code easier to
grasp. A simple unit test has been added.