Fix typos (w3c#106)

index.src.html

@@ -1167,7 +1167,7 @@ <h3 id="intervention-report">Intervention</h3>
   <dfn>Intervention reports</dfn> indicate that a user agent has decided not to
   honor a request made by the application (e.g. for security, performance or
   user annoyance reasons). Note that the report properties are the same as those
-  for <a>deprecation reports</a>, except for the absense of
+  for <a>deprecation reports</a>, except for the absence of
   [=DeprecationReportBody/anticipated_removal=].
 
   <a>Intervention reports</a> have the <a>report type</a> "intervention".
@@ -1188,7 +1188,7 @@ <h3 id="intervention-report">Intervention</h3>
   {{InterventionReportBody}}, contains the following fields:
 
     - <dfn for="InterventionReportBody">id</dfn>: an implementation-defined
-      string identifying the specific intervention that occured. This string can
+      string identifying the specific intervention that occurred. This string can
       be used for grouping and counting related reports.
 
     - <dfn for="InterventionReportBody">message</dfn>: A human-readable string