Correct way of referring to Groovy

[Schalk Cronjé]

A post of the other day made me think about this (Russel's to blame as 
usual). What is the correct to referring to Groovy in documentation now?

   Is it Groovy or is it Apache Groovy?
OR

   Is it Groovy for releases prior to 2.4 and Apache Groovy for 2.4 and 
beyond?

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Schalk W. Cronjé
Twitter / Ello / Toeter : @ysb33r