weavejester/reagi — pull request #4 by dkinzer (2014-03-19 23:53:18+00:00)
Title: Use "a" instead of "an"

I'm using the following guidelines:

"Use an before a word that starts with a vowel sound.
If it does not start with a vowel sound, use a."

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http://www.grammar-monster.com/lessons/an_or_a.htm