doc: Use self-closing tags for `return` and `argument`

For the time being we don't support writing a description for those, preferring
having all details in the method's description.

Using self-closing tags saves half the lines, and prevents contributors from
thinking that they should write the argument or return documentation there.

1 files changed, 26 insertions, 52 deletions

diff --git a/doc/classes/Callable.xml b/doc/classes/Callable.xml
index 3c61e8278f..5228df706b 100644
--- a/doc/classes/Callable.xml
+++ b/doc/classes/Callable.xml
@@ -37,148 +37,122 @@
 	</tutorials>
 	<methods>
 		<method name="Callable" qualifiers="constructor">
-			<return type="Callable">
-			</return>
+			<return type="Callable" />
 			<description>
 				Constructs a null [Callable] with no object nor method bound.
 			</description>
 		</method>
 		<method name="Callable" qualifiers="constructor">
-			<return type="Callable">
-			</return>
-			<argument index="0" name="from" type="Callable">
-			</argument>
+			<return type="Callable" />
+			<argument index="0" name="from" type="Callable" />
 			<description>
 				Constructs a [Callable] as a copy of the given [Callable].
 			</description>
 		</method>
 		<method name="Callable" qualifiers="constructor">
-			<return type="Callable">
-			</return>
-			<argument index="0" name="object" type="Object">
-			</argument>
-			<argument index="1" name="method" type="StringName">
-			</argument>
+			<return type="Callable" />
+			<argument index="0" name="object" type="Object" />
+			<argument index="1" name="method" type="StringName" />
 			<description>
 				Creates a new [Callable] for the method called [code]method[/code] in the specified [code]object[/code].
 			</description>
 		</method>
 		<method name="bind" qualifiers="vararg const">
-			<return type="Callable">
-			</return>
+			<return type="Callable" />
 			<description>
 				Returns a copy of this [Callable] with the arguments bound. Bound arguments are passed after the arguments supplied by [method call].
 			</description>
 		</method>
 		<method name="call" qualifiers="vararg const">
-			<return type="Variant">
-			</return>
+			<return type="Variant" />
 			<description>
 				Calls the method represented by this [Callable]. Arguments can be passed and should match the method's signature.
 			</description>
 		</method>
 		<method name="call_deferred" qualifiers="vararg const">
-			<return type="void">
-			</return>
+			<return type="void" />
 			<description>
 				Calls the method represented by this [Callable] in deferred mode, i.e. during the idle frame. Arguments can be passed and should match the method's signature.
 			</description>
 		</method>
 		<method name="get_method" qualifiers="const">
-			<return type="StringName">
-			</return>
+			<return type="StringName" />
 			<description>
 				Returns the name of the method represented by this [Callable].
 			</description>
 		</method>
 		<method name="get_object" qualifiers="const">
-			<return type="Object">
-			</return>
+			<return type="Object" />
 			<description>
 				Returns the object on which this [Callable] is called.
 			</description>
 		</method>
 		<method name="get_object_id" qualifiers="const">
-			<return type="int">
-			</return>
+			<return type="int" />
 			<description>
 				Returns the ID of this [Callable]'s object (see [method Object.get_instance_id]).
 			</description>
 		</method>
 		<method name="hash" qualifiers="const">
-			<return type="int">
-			</return>
+			<return type="int" />
 			<description>
 				Returns the hash value of this [Callable]'s object.
 			</description>
 		</method>
 		<method name="is_custom" qualifiers="const">
-			<return type="bool">
-			</return>
+			<return type="bool" />
 			<description>
 				Returns [code]true[/code] if this [Callable] is a custom callable whose behavior differs based on implementation details. Custom callables are used in the engine for various reasons. If [code]true[/code], you can't use [method get_method].
 			</description>
 		</method>
 		<method name="is_null" qualifiers="const">
-			<return type="bool">
-			</return>
+			<return type="bool" />
 			<description>
 				Returns [code]true[/code] if this [Callable] has no target to call the method on.
 			</description>
 		</method>
 		<method name="is_standard" qualifiers="const">
-			<return type="bool">
-			</return>
+			<return type="bool" />
 			<description>
 				Returns [code]true[/code] if this [Callable] is a standard callable, referencing an object and a method using a [StringName].
 			</description>
 		</method>
 		<method name="is_valid" qualifiers="const">
-			<return type="bool">
-			</return>
+			<return type="bool" />
 			<description>
 				Returns [code]true[/code] if the object exists and has a valid function assigned, or is a custom callable.
 			</description>
 		</method>
 		<method name="operator !=" qualifiers="operator">
-			<return type="bool">
-			</return>
-			<argument index="0" name="right" type="Callable">
-			</argument>
+			<return type="bool" />
+			<argument index="0" name="right" type="Callable" />
 			<description>
 				Returns [code]true[/code] if both [Callable]s invoke different targets.
 			</description>
 		</method>
 		<method name="operator ==" qualifiers="operator">
-			<return type="bool">
-			</return>
-			<argument index="0" name="right" type="Callable">
-			</argument>
+			<return type="bool" />
+			<argument index="0" name="right" type="Callable" />
 			<description>
 				Returns [code]true[/code] if both [Callable]s invoke the same custom target.
 			</description>
 		</method>
 		<method name="rpc" qualifiers="vararg const">
-			<return type="void">
-			</return>
+			<return type="void" />
 			<description>
 				Perform an RPC (Remote Procedure Call). This is used for multiplayer and is normally not available unless the function being called has been marked as [i]RPC[/i]. Calling it on unsupported functions will result in an error.
 			</description>
 		</method>
 		<method name="rpc_id" qualifiers="vararg const">
-			<return type="void">
-			</return>
-			<argument index="0" name="peer_id" type="int">
-			</argument>
+			<return type="void" />
+			<argument index="0" name="peer_id" type="int" />
 			<description>
 				Perform an RPC (Remote Procedure Call) on a specific peer ID (see multiplayer documentation for reference). This is used for multiplayer and is normally not available unless the function being called has been marked as [i]RPC[/i]. Calling it on unsupported functions will result in an error.
 			</description>
 		</method>
 		<method name="unbind" qualifiers="const">
-			<return type="Callable">
-			</return>
-			<argument index="0" name="argcount" type="int">
-			</argument>
+			<return type="Callable" />
+			<argument index="0" name="argcount" type="int" />
 			<description>
 				Returns a copy of this [Callable] with the arguments unbound. Calling the returned [Callable] will call the method without the extra arguments that are supplied in the [Callable] on which you are calling this method.
 			</description>