timj/aandc-fits — pull request #30 by embray (2014-03-05 20:47:16+00:00)
Title:   Correction on HEIRARCH

This is a bit nitpicky, but the current text isn't quite correct.

To say that HIERARCH cards make use of COMMENT keywords is innacurate. Rather, they use commentary keywords which are syntactic feature of the format reserved primarily for COMMENT and HISTORY keywords. But HIERARCH itself is a commentary keyword albeit not one specifically mentioned by the standard.