deduplicate finalise() across rewriter subclasses

Move the identical finalise() logic into AbstractRewriter with an
abstract getClosingCall() method. Lists, Quote, Table, Preformatted
and Nest each

deduplicate finalise() across rewriter subclasses

Move the identical finalise() logic into AbstractRewriter with an
abstract getClosingCall() method. Lists, Quote, Table, Preformatted
and Nest each provide their closing call name instead of duplicating
the full method.

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updated rector and applied it

Use str_starts_with/str_ends_with

code style: operator spacing

codestyle adjustments: function declaration braces/spaces

apply PSR-12 constant visibility rule

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

Apply rector fixes to inc/Parsing

Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be acc

Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be accessed and removes some duplicate code by introducing an
abstract base class.

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moved all parsing related namespaces to their own