[openstreetmap-website] Diary cleanup (#218)

[Saman Bemel-Benrud]

Without the limit, it was easy to hit really unwieldy line lengths. [some background on readability and line length](http://baymard.com/blog/line-length-readability). 

Anything else you want me to look at here?

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/218#issuecomment-16155511
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