logging: update "Grouping Logs by Request" docs
Fixes: 1598
@@ -121,9 +121,9 @@ project, and have the same MonitoredResource type and labels.
- Parent entries must have HTTPRequest.Request populated. (Strictly speaking, only the URL is necessary.)
-- A child entry's timestamp must be within the time interval covered by the parent request (i.e., older
-than parent.Timestamp, and newer than parent.Timestamp - parent.HTTPRequest.Latency, assuming the
-parent timestamp marks the end of the request.
+- A child entry's timestamp must be within the time interval covered by the parent request. (i.e., before
+the parent.Timestamp and after the parent.Timestamp - parent.HTTPRequest.Latency. This assumes the
+parent.Timestamp marks the end of the request.)
- The trace field must be populated in all of the entries and match exactly.
