I would imagine this would make reading harder, but is it allowed to finish a
word on the next line if you run out of room? Does it not matter?

。。。。お姉さんはとて  
も楽しです！
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2014-11-17T00:04:11.380
19551
2014-11-17T00:04:11.380
7722
question
orthography
Are you allowed to continue words on the next line?