Fixed the double arrow multiline whitespace fixer
bug #892 Fixed the double arrow multiline whitespace fixer (GrahamCampbell)

This PR was submitted for the 1.5 branch but it was merged into the 1.4 branch instead (closes #892).

Discussion
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Fixed the double arrow multiline whitespace fixer

Fixes #787. I'd prefer if this could get into 1.4, but I understand if this needs to go into 1.5.

Commits
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355451d Fixed the double arrow multiline whitespace fixer