docs: evas: fill last gaps in evas eo file documentation

src/lib/evas/canvas/efl_ui_selectable.eo

@@ -3,13 +3,13 @@ interface Efl.Ui.Selectable ()
    [[Efl UI selectable interface]]
    event_prefix: efl_ui;
    events {
-      selected;
-      unselected;
-      selection,paste;
-      selection,copy;
-      selection,cut;
-      selection,start;
-      selection,changed;
-      selection,cleared;
+      selected; [[Called when selected]]
+      unselected; [[Called when no longer selected]]
+      selection,paste; [[Called when selection got pasted]]
+      selection,copy; [[Called when selection was copied]]
+      selection,cut; [[Called when selection was cut]]
+      selection,start; [[Called at selection start]]
+      selection,changed; [[Called when selection changed]]
+      selection,cleared; [[Called when selection was cleared]]
    }
 }

src/lib/evas/canvas/evas_text.eo

@@ -160,6 +160,7 @@ class Evas.Text (Efl.Canvas.Object, Efl.Text, Efl.Text.Properties, Efl.Canvas.Fi
          }
       }
       @property max_descent {
+      	 [[Maximal descent property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
@@ -184,31 +185,37 @@ class Evas.Text (Efl.Canvas.Object, Efl.Text, Efl.Text.Properties, Efl.Canvas.Fi
          }
       }
       @property ascent {
+      	 [[Ascent property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
       }
       @property horiz_advance {
+      	 [[Horizontal advance property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
       }
       @property inset {
+      	 [[Inset property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
       }
       @property max_ascent {
+      	 [[Maximal ascent property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
       }
       @property vert_advance {
+      	 [[Vertical advance property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
       }
       @property descent {
+      	 [[descent property]]
          get {
             return: Evas.Coord; [[Evas coordinate]]
          }
@@ -222,6 +229,7 @@ class Evas.Text (Efl.Canvas.Object, Efl.Text, Efl.Text.Properties, Efl.Canvas.Fi
          }
       }
       char_coords_get @const {
+      	 [[Get character coordinates]]
          return: int; [[Logical poistion of char]]
          params {
             @in x: Evas.Coord; [[X coordinate]]

src/lib/evas/include/evas_ector_buffer.eo

@@ -7,6 +7,7 @@ interface Evas.Ector.Buffer
    [[Evas ector buffer interface]]
    methods {
       @property engine_image {
+      	 [[Engine image property]]
          get {}
          set { [[This Buffer will hold a reference to the evas image struct.]] }
          values {