Fix definition of ChangesCountMap (#227)

* Fix definition of ChangesCountMap

ChangesCountMap is a map with source as key
and state changes count as value.

Fixes: #226

index.html

@@ -375,11 +375,14 @@ <h3>
       a <dfn>[[\PenaltyDuration]]</dfn> integer set as part of the [=reset observation window=] steps.
     </li>
     <li>
-      a <dfn>[[\ChangesCountMap]]</dfn> integer set as part of the [=reset observation window=] steps.
+      a <dfn>[[\ChangesCountMap]]</dfn> [=ordered map=], [=map/keyed=] on a {{PressureSource}},
+      representing the [=source type=] that triggered transition to the [=current pressure state=].
+      The [=ordered map=]'s [=map/value=] is an integer representing the number of state changes in the
+      current observation window timeframe.
     </li>
     <li>
       a <dfn>[[\AfterPenaltyRecordMap]]</dfn> [=ordered map=], [=map/keyed=] on a {{PressureSource}},
-      representing the [=source type=] to which the last record belongs.
+      representing the [=source type=] of the last {{PressureRecord}}.
       The [=ordered map=]'s [=map/value=] is a {{PressureRecord}}.
     </li>
   </ul>