format temporary variables in loops in newline

[kdauer]

Problem to solve

As Squeak Developer, I want temporary variables set in a new line when I have a loop so that there is a better overview and I don't get confused with all the pipe chars |.

Further details

currently a do-loop with a temp var looks like this:

aNode elements do: [:element | | isLast |
			isLast := element = aNode elements last.

for a better overview the temp var should be in a newline like this

aNode elements do: [:element | 
                         | isLast |
			isLast := element = aNode elements last.

Acceptance Criteria

• Given any method with a temp var in a block. When the method is formatted, then the temp var is set in a new line
• The preference can be turned on and off in the poppyprint-preferences
• Code Example:

aNode elements do: [:element | 
                         | isLast |
			isLast := element = aNode elements last.