Add support to access multiple rows at once

When saving word indexs (w*.idx) often multiple words of the same length
will need to be accessed. This implements a new method that allows that
in an eff

Add support to access multiple rows at once

When saving word indexs (w*.idx) often multiple words of the same length
will need to be accessed. This implements a new method that allows that
in an efficient way.

Note: this removes the INDEX_MARK_DELETED mechanism to mark deleted
entries. Entries are now deleted using empty lines again. This makes the
batch handling much simpler. If a good reason exists that we should keep
it, it can be readded.

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rearranging the Index class structure

This is a first step at stuff at restructuring the indexing classes a
bit more.

Some background:

We have basically two different kind of index files:

a) RowI

rearranging the Index class structure

This is a first step at stuff at restructuring the indexing classes a
bit more.

Some background:

We have basically two different kind of index files:

a) RowIndex (like page.idx)

Each line in the index contains a single value. The line number is used
as primary ID. These files can be very large. Thus an index like that
should never be read into memory completely if it can be avoided.

b) TupleIndex (like i12.idx)

Each line contains a list of tuples. The files tend to be smaller so
loading them completely for search and replace is easier.

Since the the access is so completely different, I tried to model that
in the two different classes, basically moving the methods from
\dokuwiki\Search\AbstractIndex to the new classes.

While doing so, I tried to make the doc blocks, variable names and
interface easier to understand. I also added tests for each of the
methods.

The old code has not been touched yet. So these classes do not do
anything outside of tests currently.

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use Logger::debug() instead of deprecated dbglog()

catch up #3115 Sort with collator

added missing 'notns' related code

fix undefined array in FulltextSearch

this was already fixed by 5afd958 on 2021-02-05

Update common_saveWikiText.test.php

allow 2nd to last revision check for normal save

fix undefined variable

update unittest checkChangeLogAfterNormalSave

add routine for "save on top of external edit" assertions

add dbg_deprecated()

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