Rewrite the methods section of the Thread class

doc/base/classes.xml

@@ -52272,14 +52272,14 @@
 			<return type="String">
 			</return>
 			<description>
-				Return the id of the thread, uniquely identifying it among all threads.
+				Returns the current [Thread]\ s id, uniquely identifying it among all threads.
 			</description>
 		</method>
 		<method name="is_active" qualifiers="const">
 			<return type="bool">
 			</return>
 			<description>
-				Whether this thread is currently active, an active Thread cannot start work on a new method but can be joined with [method wait_to_finish].
+				Returns true if this [Thread] is currently active. An active [Thread] cannot start work on a new method but can be joined with [method wait_to_finish].
 			</description>
 		</method>
 		<method name="start">
@@ -52294,7 +52294,7 @@
 			<argument index="3" name="priority" type="int" default="1">
 			</argument>
 			<description>
-				Start a new [Thread], it will run "method" on object "instance" using "userdata" as an argument and running with "priority", one of PRIORITY_* enum.
+				Starts a new [Thread] that runs "method" on object "instance" with "userdata" passed as an argument. The "priority" of the [Thread] can be changed by passing a PRIORITY_* enum.
 				Returns OK on success, or ERR_CANT_CREATE on failure.
 			</description>
 		</method>