lib/review/preprocessor.rb: remove unnecessary LF insertion.
lib/review/preprocessor.rb: remove unnecessary LF insertion.

takahashim/review,kmuto/review,murashitas/review,suzuki/review,takahashim/review,orangain/review,krororo/review,kmuto/review,krororo/review,kuad9/review_study,masawada/review,krororo/review,kuad9/review_study,suzuki/review,masawada/review,orangain/review,murashitas/review,kmuto/review