docs: nicer formatting of the NULL keyword, everywhere

src/lib/ecore/ecore_event_message.eo

@@ -15,7 +15,7 @@ class @beta Ecore.Event.Message extends Efl.Loop_Message
       }
       data_steal {
          [[ Steal the data out and set internal values to -1
-            for type and NULL for other vals ]]
+            for type and $NULL for other vals ]]
          params {
             @out type: int; [[ The event type ]]
             @out data: void_ptr; [[ The event data ]]

src/lib/ecore/efl_io_copier.eo

@@ -147,7 +147,7 @@ class @beta Efl.Io.Copier extends Efl.Loop_Consumer implements Efl.Io.Closer {
              If @.source is flagged "eos" and all data is written to the
              destination then the "done" event is emitted.
 
-             If the destination is not set (ie: NULL) then data is kept
+             If the destination is not set (ie: $NULL) then data is kept
              in a internal @Eina.Binbuf, which can be stolen with
              @.binbuf_steal once "data" or "line" events are
              emitted. It exists as a useful shortcut to easily drain

src/lib/ecore_audio/ecore_audio.eo

@@ -89,7 +89,7 @@ abstract @beta Ecore.Audio extends Efl.Object
               data: void_ptr; [[User data to pass to the VIO functions]]
               free_func: efl_key_data_free_func; [[This function takes care to
                                                   clean up $data when he VIO is
-                                                  destroyed. NULL means do
+                                                  destroyed. $NULL means do
                                                   nothing.
                                                 ]]
          }

src/lib/ecore_con/efl_net_dialer.eo

@@ -74,7 +74,7 @@ interface @beta Efl.Net.Dialer extends Efl.Net.Socket {
               'http'.
 
               Whenever appropriate dialers may use system proxy if the
-              proxy is NULL (the default). To forcefully disable
+              proxy is $NULL (the default). To forcefully disable
               proxy, use an empty string ("").
 
                 - http://username:password\@proxyserver:port
@@ -91,7 +91,7 @@ interface @beta Efl.Net.Dialer extends Efl.Net.Socket {
             get { }
             set { }
             values {
-                proxy_url: string; [[May be empty or NULL to unset]]
+                proxy_url: string; [[May be empty or $NULL to unset]]
             }
         }
 

src/lib/ecore_con/efl_net_dialer_http.eo

@@ -31,7 +31,7 @@ class @beta Efl.Net.Dialer_Http extends Efl.Loop_Consumer implements Efl.Net.Dia
       To enable debugging use EINA_LOG_LEVELS=ecore_con:4 environment
       variable.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $http_proxy (or
       '$all_proxy') is used if the given address doesn't match
       $no_proxy patterns. To disable proxy use an empty string. If
@@ -259,7 +259,7 @@ class @beta Efl.Net.Dialer_Http extends Efl.Loop_Consumer implements Efl.Net.Dia
               Since multiple requests can occur if @.allow_redirects
               is true, then all headers will be accumulated. To know
               when a new request's been started, check for headers with keys
-              being NULL. The value will be the "HTTP/VERSION RESPONSE"
+              being $NULL. The value will be the "HTTP/VERSION RESPONSE"
               string received from the host, such as:
 
                 - key=NULL, value="HTTP/1.1 302 Found"
@@ -381,7 +381,7 @@ class @beta Efl.Net.Dialer_Http extends Efl.Loop_Consumer implements Efl.Net.Dia
             params {
                 epochtime: int64; [[UNIX Epoch time - seconds since 1/1/1970]]
             }
-            return: mstring @move @no_unused; [[Newly allocated null-terminated string on success or NULL on errors]]
+            return: mstring @move @no_unused; [[Newly allocated null-terminated string on success or $NULL on errors]]
         }
     }
 

src/lib/ecore_con/efl_net_dialer_ssl.eo

@@ -4,12 +4,12 @@ class @beta Efl.Net.Dialer_Ssl extends Efl.Net.Socket_Ssl implements Efl.Net.Dia
       This creates an internal @Efl.Net.Dialer_Tcp and once connected
       it will start the SSL handshake.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $socks_proxy (or
       '$proxy' or '$all_proxy') is used if the given address doesn't
       match $no_proxy patterns. To disable proxy use an empty string.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $socks_proxy (or
       '$all_proxy') is used if the given address doesn't match
       $no_proxy patterns. To disable proxy use an empty string. If

src/lib/ecore_con/efl_net_dialer_tcp.eo

@@ -1,12 +1,12 @@
 class @beta Efl.Net.Dialer_Tcp extends Efl.Net.Socket_Tcp implements Efl.Net.Dialer {
     [[Connects to a remote TCP server.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $socks_proxy (or
       '$proxy' or '$all_proxy') is used if the given address doesn't
       match $no_proxy patterns. To disable proxy use an empty string.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $socks_proxy (or
       '$all_proxy') is used if the given address doesn't match
       $no_proxy patterns. To disable proxy use an empty string. If

src/lib/ecore_con/efl_net_dialer_websocket.eo

@@ -52,7 +52,7 @@ class @beta Efl.Net.Dialer_Websocket extends Efl.Loop_Consumer implements Efl.Ne
       not a subclass and thus not all HTTP features are exposed as the
       WebSocket has strict requirements that must be respected.
 
-      If the proxy is NULL (default), then the system proxy will be
+      If the proxy is $NULL (default), then the system proxy will be
       used. On UNIX that's the environment variable $http_proxy (or
       '$all_proxy') is used if the given address doesn't match
       $no_proxy patterns. To disable the proxy use an empty string. If

src/lib/ecore_con/efl_net_ip_address.eo

@@ -85,7 +85,7 @@ class @beta Efl.Net.Ip_Address extends Efl.Object {
             params {
                 numeric_address: string; [[The numeric address to parse, such as '127.0.0.1:1234' or '[::1]:1234']]
             }
-            return: Efl.Net.Ip_Address @move; [[The new IP address object or NULL if it failed to parse]]
+            return: Efl.Net.Ip_Address @move; [[The new IP address object or $NULL if it failed to parse]]
         }
 
         resolve @static {

src/lib/ecore_con/efl_net_session.eo

@@ -34,10 +34,10 @@ class @beta Efl.Net.Session extends Efl.Loop_Consumer {
       Some platforms may not implement the backend for this class. In
       this cases the system will report always @.state "online"
       (@Efl.Net.Session_State.online) and other properties will be
-      NULL, such as @.network_name, @.interface, @.ipv4 and @.ipv6; as well as
+      $NULL, such as @.network_name, @.interface, @.ipv4 and @.ipv6; as well as
       @.technology is set to @Efl.Net.Session_Technology.unknown. As such
       if you need to detect for an actual backend, check if the
-      state is online but those properties are NULL or technology is
+      state is online but those properties are $NULL or technology is
       unknown.
 
       Note: the @.connect method is subject to backend policy. For
@@ -92,7 +92,7 @@ class @beta Efl.Net.Session extends Efl.Loop_Consumer {
               Note: if there is no backend for this class, then state
               will be always online, however @.technology will be
               unknown, @.interface, @.network_name, @.ipv4 and @.ipv6 will be
-              NULL.
+              $NULL.
             ]]
             get { }
             values {

src/lib/ecore_con/efl_net_socket_ssl.eo

@@ -37,8 +37,8 @@ class @beta Efl.Net.Socket_Ssl extends Efl.Loop_Consumer implements Efl.Net.Sock
                 return: bool(false); [[$true if adopted, $false otherwise]]
             }
             values {
-                efl_net_socket: Efl.Net.Socket; [[The adopted object, if any, otherwise NULL]]
-                ctx: Efl.Net.Ssl.Context; [[The SSL context used when adopting the socket, if any, otherwise NULL]]
+                efl_net_socket: Efl.Net.Socket; [[The adopted object, if any, otherwise $NULL]]
+                ctx: Efl.Net.Ssl.Context; [[The SSL context used when adopting the socket, if any, otherwise $NULL]]
             }
         }
 
@@ -68,7 +68,7 @@ class @beta Efl.Net.Socket_Ssl extends Efl.Loop_Consumer implements Efl.Net.Sock
               address but the server certificate only specifies DNS
               (names).
 
-              If NULL, then it will fetch from socket using
+              If $NULL, then it will fetch from socket using
               @Efl.Net.Socket.address_remote or
               @Efl.Net.Dialer.address_dial.
 

src/lib/ecore_con/efl_net_ssl_context.eo

@@ -115,7 +115,7 @@ class @beta Efl.Net.Ssl.Context extends Efl.Object {
               This is useful to avoid replicating a hostname in all
               socket wrapper with hostname_override.
 
-              If NULL, then sockets wrappers will will fetch from
+              If $NULL, then sockets wrappers will will fetch from
               adopted socket using address_remote or
               address_dial.
 

src/lib/efl/interfaces/efl_gfx_color_class.eo

@@ -75,7 +75,7 @@ mixin @beta Efl.Gfx.Color_Class
               the third is the text shadow. (Note that the second two only apply
               to text parts).
 
-              Returns NULL if the color class cannot be fetched.
+              Returns $NULL if the color class cannot be fetched.
 
               Note: These color values are expected to be premultiplied by $a.]]
           }

src/lib/efl/interfaces/efl_io_buffer.eo

@@ -131,7 +131,7 @@ class @beta Efl.Io.Buffer extends Efl.Object
               The returned memory must be freed with eina_binbuf_free().
 
               On failure, for example a read-only backing store was
-              adopted with @.adopt_readonly, NULL is returned.
+              adopted with @.adopt_readonly, $NULL is returned.
             ]]
             return: ptr(Eina.Binbuf) @move @no_unused; [[Binbuf]]
         }

src/lib/elementary/efl_access_object.eo

@@ -435,7 +435,7 @@ mixin @beta Efl.Access.Object requires Efl.Object
       relationship_remove @beta {
          [[Removes the relationship between two accessible objects.
 
-          If relation_object is NULL function removes all relations
+          If relation_object is $NULL function removes all relations
           of the given type.
          ]]
          params {

src/lib/elementary/efl_ui_item.eo

@@ -46,9 +46,9 @@ abstract @beta Efl.Ui.Item extends Efl.Ui.Layout_Base implements Efl.Ui.Selectab
       @property item_parent {
          [[The parent of the item.
 
-           This property expresses a tree structure of items. If the parent is NULL the item is added to
+           This property expresses a tree structure of items. If the parent is $NULL the item is added to
            the root level of the content. The item parent can only be set once.
-           When the object is invalidated, the item parent is set to NULL and still cannot be reset.
+           When the object is invalidated, the item parent is set to $NULL and still cannot be reset.
          ]]
          values {
             parent : Efl.Ui.Item;

src/lib/elementary/efl_ui_popup.eo

@@ -82,10 +82,10 @@ class @beta Efl.Ui.Popup extends Efl.Ui.Layout_Base implements Efl.Content, Efl.
            - the Popup is resized
            - the parent window is resized
 
-           If @.anchor.get returns NULL, the anchor is the parent window of the Popup.
+           If @.anchor.get returns $NULL, the anchor is the parent window of the Popup.
            If the anchor object is set to $NULL, the Popup will no longer recalculate its alignment or change
            its position under any circumstance.
-           If the Popup is moved by using @Efl.Gfx.Entity.position.set, $anchor is set NULL.
+           If the Popup is moved by using @Efl.Gfx.Entity.position.set, $anchor is set $NULL.
          ]]
          set {
          }

src/lib/elementary/efl_ui_position_manager_data_access_v1.eo

@@ -118,7 +118,7 @@ interface @beta Efl.Ui.Position_Manager.Data_Access_V1 {
          values {
            obj_access : Efl.Ui.Position_Manager.Object_Batch_Callback; [[Function callback for canvas objects, even if
                                                                          the start_id is valid, the returned objects
-                                                                         may be NULL.]]
+                                                                         may be $NULL.]]
            size_access : Efl.Ui.Position_Manager.Size_Batch_Callback; [[Function callback for the size, returned values
                                                                         are always valid, but might be changed later on.
                                                                       ]]

src/lib/elementary/efl_ui_scroll_manager.eo

@@ -12,7 +12,7 @@ class @beta Efl.Ui.Scroll.Manager extends Efl.Object implements
 
       This property is protected as it is meant for scrollable object
       implementations only, to set and access the internal pan object.
-      If pan is set to NULL, scrolling does not work.
+      If pan is set to $NULL, scrolling does not work.
     ]]
          set {
          }

src/lib/elementary/efl_ui_spotlight_container.eo

@@ -91,7 +91,7 @@ class @beta Efl.Ui.Spotlight.Container extends Efl.Ui.Layout_Base implements Efl
          ]]
          params {
             deletion_on_transition_end : bool; [[If $true, then the object will be deleted before resolving the future,
-                                                 and a NULL pointer is the value of the future.
+                                                 and a $NULL pointer is the value of the future.
                                                  $false if no operation should be applied to it.]]
          }
          return : future<Efl.Gfx.Entity>; [[This Future gets resolved when any transition animation finishes and the

src/lib/elementary/efl_ui_tags.eo

@@ -40,7 +40,7 @@ class @beta Efl.Ui.Tags extends Efl.Ui.Layout_Base
          get {
          }
          values {
-            items: const(array<string>); [[The array of items, or NULL if none.]]
+            items: const(array<string>); [[The array of items, or $NULL if none.]]
          }
       }
    }

src/lib/elementary/efl_ui_text.eo

@@ -359,7 +359,7 @@ class @beta Efl.Ui.Text extends Efl.Ui.Layout_Base implements Efl.Input.Clickabl
    }
    events {
       changed: void; [[Called when entry changes]]
-      /* can be NULL, tag nullable once Eolian supports it */
+      /* can be $NULL, tag nullable once Eolian supports it */
       changed,user: Efl.Ui.Text_Change_Info;
          [[The text object has changed due to user interaction]]
       validate: Elm.Validate_Content; [[Called when validating]]

src/lib/elementary/elm_code_widget.eo

@@ -36,7 +36,7 @@ class @beta Elm.Code_Widget extends Efl.Ui.Layout
       @property font {
          set {
             [[Set the font that this widget uses, the font should be a monospaced scalable font.
-            Passing NULL will load the default system monospaced font.]]
+            Passing $NULL will load the default system monospaced font.]]
          }
          get {
             [[Get the font currently in use.

src/lib/eo/efl_object.eo

@@ -205,7 +205,7 @@ abstract Efl.Object
 
           The object from the provider will then be returned.
           The base implementation calls the provider_find function on the object parent,
-          and returns its result. If no parent is present NULL is returned.
+          and returns its result. If no parent is present $NULL is returned.
           Each implementation has to support this function by overriding
           it and returning itself if the interface matches the parameter.
           If this is not done the class cannot be found up in the object tree.

src/lib/evas/canvas/efl_canvas_animation_rotate.eo

@@ -14,7 +14,7 @@ class @beta Efl.Canvas.Animation_Rotate extends Efl.Canvas.Animation
             from_degree: double; [[Rotation degree when animation starts]]
             to_degree: double; [[Rotation degree when animation ends]]
             pivot: Efl.Canvas.Object; [[Pivot object for the center point.
-                                        If the pivot object is NULL, then the object is rotated on itself.]]
+                                        If the pivot object is $NULL, then the object is rotated on itself.]]
             cx: double; [[X relative coordinate of the center point.
                           The left end is 0.0 and the right end is 1.0 (the center is 0.5).]]
             cy: double; [[Y relative coordinate of the center point.

src/lib/evas/canvas/efl_canvas_animation_scale.eo

@@ -15,7 +15,7 @@ class @beta Efl.Canvas.Animation_Scale extends Efl.Canvas.Animation
             from_scale_y: double; [[Scale factor along y axis when animation starts]]
             to_scale_x: double; [[Scale factor along x axis when animation ends]]
             to_scale_y: double; [[Scale factor along y axis when animation ends]]
-            pivot: Efl.Canvas.Object; [[Pivot object for the center point. If the pivot object is NULL, then the object
+            pivot: Efl.Canvas.Object; [[Pivot object for the center point. If the pivot object is $NULL, then the object
                                         is scaled on itself.]]
             cx: double; [[X relative coordinate of the center point. The left end is 0.0 and the right end is 1.0
                           (the center is 0.5).]]