Updated Logger (markdown)

Logger.md

@@ -10,7 +10,7 @@ Also, the logger is now _unified_:
 - All events from everywhere are logged in one place, no need to select which tab to inspect.
     - This is particularly useful to relate together behind-the-scene event to ongoing network traffic.
 
-##### Special status indicators
+#### Special status indicators
 
 The _eye-slash_ indicator means the entry is a behind-the-scene network request.
 
@@ -18,7 +18,7 @@ The _x_ indicator means the entry belongs to a tab which has been closed. You ma
 
 It is possible to click on the status indicator area to open the matrix for the associated tab (if any). The matrix will open in _sticky_ mode, i.e. you can keep it opened permanently. The opened matrix will reflect the state of a specific tab in the browser, so log entries which are not related to that tab will be dimmed.
 
-##### Filter expressions
+#### Filter expressions
 
 You can filter entries in the logger using filter expressions. Log entries which do not match _all_ filter expressions will be hidden from view. Syntax for a filter expression:
 
@@ -31,3 +31,8 @@ You can filter entries in the logger using filter expressions. Log entries which
     - `!foo` means display only entries which do not have the string `foo` in it.
     - `!|--` means display only entries which were **not** blocked.
 - When more than one filter expression appear, a logical _and_ between the expressions is implied.
+
+Examples:
+
+- `!|-- facebook`: Show all non-blocked entries with the string `facebook` in it.
+- `|xhr google`: show all entries of type `XMLHttpRequest` with the work `google` in it.