[Lazarus] Using FPC parser/tokenizer for code formatting

[Adem]

> What I miss in all code formatters is formatting fragments. For example
> when the codetools adds missing procedures or when a code template is
> inserted or when some fragment is pasted from clipboard the IDE should
> format this fragment with the user settings. For performance reasons
> the formatter should not rescan the whole unit every time a fragment
> is inserted.
>
> Mattias
This is also what I would like to see.

Indeed, I get confused when I see so many options for code formatters 
without visual feedback.

What I really would like to see is, when I do change an option, what the 
code will be like.

IOW, code formatter should be able to act upon code snippets too.