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by SeanLuke 1265 days ago
#1 on my list has got to be the myriad of LaTeX-writers who think that math variables can be longer than a single letter. That is, they write things like:

    $foo + bar$
... not realizing that LaTeX is typesetting these to imply f times o times o + b times a times r. It looks horrible. A simple fix would be:

    $\text{\it foo} + \text{\it bar}$