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stefano-meschiari / latex2exp

Use LaTeX in R graphics.
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Ensure that calling TeX with an empty argument returns expression('') #41

Closed stefano-meschiari closed 2 years ago

stefano-meschiari commented 2 years ago

Fixes #40 by returning expression('') when TeX is called with an empty string.

Adds tests around expected return type/class and length.