Add spec for issue #312
Fix calculation of arrow alignment column for multiple arrows on one line
Specs for fixing arrow_alignment issues where multiple params are on the same line
Handle multiple params on a line when fixing arrow_alignment problems

Move the additional params onto their own lines and indent them properly before
adusting the whitespace between param and arrow to fix alignment.
Merge pull request #322 from rodjek/issue-312

Handle multiple parameters on a line when fixing arrow_alignment problems