code style: inc/dec spacing

code style: control structure fixes

code style: indent fixes

Rector to rename print to echo calls

polyfills for str_(starts_with|ends_with|contains)

code style: ptln removed, useradmin cleanup

deprecate ptln()

This method was used to ensure some basic readability in the created
HTML sources long before Firebug and later the builtin inspector tools
in browsers pretty printed the HTML for y

deprecate ptln()

This method was used to ensure some basic readability in the created
HTML sources long before Firebug and later the builtin inspector tools
in browsers pretty printed the HTML for you. Today, this is no longer
needed.

This adds a custom rector rule to automatically change all occurances to
echo statements.

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coding style: control flow line breaks

catch JSON decode exception

coding style: control flow whitespaces

fix abstract declaration of ChangeLog::getFilename()

update some plugin classes in phpdocs, reformatting

recover comments in list

coding style: function call spacing

coding style: loop declaration spacing

coding style: PSR12.Classes.ClassInstantiation.MissingParentheses

address issues mention in PR#4045

codestyle adjustments: PHP constant casing

codestyle adjustments: EOF new lines

codestyle adjustments: function declaration braces/spaces

codestyle adjustments: class declaration braces

codestyle adjustments: function argument spacing

Apply rector renames

define custom renames

Automatically rename occurances of deprecated functions and classes.
These renames will come in even more handy when rector is applied to 3rd
party plugins.

apply PSR-12 constant visibility rule

PSR-12 says constants need their visibility declared from PHP 7.1
onwards