Add empty space to beginning and end of Declaration and Implementation section

[camais]

This way, reading the lines are a bit easier when doing a diff in the TcPOU xml view

    <Declaration><![CDATA[

PROGRAM MAIN
VAR
testBit : BOOL;
END_VAR
]]>

vs

<Declaration><![CDATA[PROGRAM MAIN

VAR
testBit : BOOL;
END_VAR]]>

[Roald87]

Hi @camais, thanks for your input!

The extra white line for the end of the declaration part is already implemented. For the implementation part I will also do this. See also the style guide.

As for the extra white line at the start I'm not sure yet. It was also shortly discussed in this open PR #41 (comment).