Improve documentation of overlay dev guide overlay_trigger fun

Author: wiktor-obrebski

docs/dev/overlay-dev-guide.rst

@@ -71,21 +71,21 @@ beyond your everyday `widgets.Widget <widget>`:
     widgets owned by the overlay framework must not be attached to that new
     screen, but the returned screen can instantiate and configure any new views
     that it wants to. See the `hotkeys` DFHack logo widget for an example.
-
-The ``overlay_trigger()`` command enables the activation of overlay widgets
-via the command line interface (CLI) or keybindings.
-For example, executing ``overlay trigger notes.map_notes add Kitchen``::
-
-    function MyOverlayWidget:overlay_trigger(arg1, arg2)
-        if arg1 == 'add' then
-            -- Add a new note to the map
-            self:addSomething(arg2)
-        elseif arg1 == 'delete' then
-            self:deleteSomething(arg2)
+    The ``overlay_trigger()`` function enables the activation of overlay widgets
+    via the command line interface (CLI) or keybindings.
+
+    For example, executing ``overlay trigger notes.map_notes add Kitchen``::
+
+        function MyOverlayWidget:overlay_trigger(arg1, arg2)
+            if arg1 == 'add' then
+                -- Add a new note to the map
+                self:addSomething(arg2)
+            elseif arg1 == 'delete' then
+                self:deleteSomething(arg2)
+            end
         end
-    end
 
-This allows for dynamic updates to the game's UI overlays directly from the CLI.
+    This allows for dynamic updates to UI overlays directly from the CLI.
 
 If the widget can take up a variable amount of space on the screen, and you want
 the widget to adjust its position according to the size of its contents, you can