-;;; Conventionally a string like "0.6.6" is used for released
-;;; versions, and a string like "0.6.5.12" is used for versions which
-;;; aren't released but correspond only to CVS tags or snapshots.
+;;; Conventionally a string like "0.6.6", with three numeric fields,
+;;; is used for released versions, and a string like "0.6.5.12", with
+;;; four numeric fields, is used for versions which aren't released
+;;; but correspond only to CVS tags or snapshots.