Fix incorrect TabContainer documentation for 'get_tab_control()'

doc/classes/TabContainer.xml

@@ -36,10 +36,10 @@
 		<method name="get_tab_control" qualifiers="const">
 			<return type="Control">
 			</return>
-			<argument index="0" name="idx" type="int">
+			<argument index="0" name="tab_idx" type="int">
 			</argument>
 			<description>
-				Returns the currently visible tab's [Control] node.
+				Returns the [Control] node from the tab at index [code]tab_idx[/code].
 			</description>
 		</method>
 		<method name="get_tab_count" qualifiers="const">

doc/classes/TreeItem.xml

@@ -23,8 +23,7 @@
 			<argument index="4" name="tooltip" type="String" default="&quot;&quot;">
 			</argument>
 			<description>
-				Adds a button with [Texture2D] [code]button[/code] at column [code]column[/code]. The [code]button_idx[/code] index is used to identify the button when calling other methods. If not specified, the next available index is used, which may be retrieved by calling [method get_button_count] immediately after this method. Optionally, the button can be [code]disabled[/code] and have a [code]tooltip
-				[/code].
+				Adds a button with [Texture2D] [code]button[/code] at column [code]column[/code]. The [code]button_idx[/code] index is used to identify the button when calling other methods. If not specified, the next available index is used, which may be retrieved by calling [method get_button_count] immediately after this method. Optionally, the button can be [code]disabled[/code] and have a [code]tooltip[/code].
 			</description>
 		</method>
 		<method name="call_recursive" qualifiers="vararg">

scene/gui/tab_container.cpp

@@ -990,7 +990,7 @@ void TabContainer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_current_tab"), &TabContainer::get_current_tab);
 	ClassDB::bind_method(D_METHOD("get_previous_tab"), &TabContainer::get_previous_tab);
 	ClassDB::bind_method(D_METHOD("get_current_tab_control"), &TabContainer::get_current_tab_control);
-	ClassDB::bind_method(D_METHOD("get_tab_control", "idx"), &TabContainer::get_tab_control);
+	ClassDB::bind_method(D_METHOD("get_tab_control", "tab_idx"), &TabContainer::get_tab_control);
 	ClassDB::bind_method(D_METHOD("set_tab_align", "align"), &TabContainer::set_tab_align);
 	ClassDB::bind_method(D_METHOD("get_tab_align"), &TabContainer::get_tab_align);
 	ClassDB::bind_method(D_METHOD("set_tabs_visible", "visible"), &TabContainer::set_tabs_visible);