Add "Since: 5.2.6" to new doc entries

Author: MarkOates

docs/src/refman/acodec.txt

@@ -36,6 +36,8 @@ Return true on success.
 
 Returns true if the acodec addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 ## API: al_get_allegro_acodec_version
 
 Returns the (compiled) version of the addon, in the same format as

docs/src/refman/font.txt

@@ -75,6 +75,8 @@ See also: [al_init_image_addon], [al_init_ttf_addon], [al_shutdown_font_addon]
 
 Returns true if the font addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 See also: [al_init_image_addon], [al_shutdown_font_addon]
 
 ### API: al_shutdown_font_addon
@@ -706,6 +708,8 @@ Returns true on success, false on failure.
 
 Returns true if the TTF addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 See also: [al_init_ttf_addon], [al_shutdown_ttf_addon]
 
 ### API: al_shutdown_ttf_addon

docs/src/refman/image.txt

@@ -33,6 +33,8 @@ have the pixel format matching the format in the file.
 
 Returns true if the image addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 ## API: al_shutdown_image_addon
 
 Shut down the image addon. This is done automatically at program exit,

docs/src/refman/native_dialog.txt

@@ -35,6 +35,8 @@ See also: [al_shutdown_native_dialog_addon]
 
 Returns true if the native dialog addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 ## API: al_shutdown_native_dialog_addon
 
 Shut down the native dialog addon.

docs/src/refman/primitives.txt

@@ -27,6 +27,8 @@ See also: [al_shutdown_primitives_addon]
 
 Returns true if the primitives addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 See also: [al_init_primitives_addon], [al_shutdown_primitives_addon]
 
 ### API: al_shutdown_primitives_addon

docs/src/refman/video.txt

@@ -69,6 +69,8 @@ Since: 5.1.12
 
 Returns true if the video addon is initialized, otherwise returns false.
 
+Since: 5.2.6
+
 ## API: al_shutdown_video_addon
 
 Shut down the video addon. This is done automatically at program exit,