Fixed side effect from invocation of cleaner in unfluff.lazy#21

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franza wants to merge 3 commits intoageitgey:masterfrom

franza:master

Commits on Aug 23, 2014

refactored some places to exit functions fast to avoid nesting
franza
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Commits on Aug 29, 2014

fixed side effect from cleaner invocation in unfluff.lazy
franza
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Commits on Aug 30, 2014

Added test case to check cleaner side effects
franza
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