Fix flake8 violations

- Remove "(deprecated)" suffix from components property one-liner to
  avoid D402 (pydocstyle: first line should not be function's signature)
- Wrap long line in start_managing docstring (E501: > 100 chars)

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

Author: llucax

src/frequenz/dispatch/_actor_dispatcher.py

@@ -42,7 +42,7 @@ class DispatchInfo:
     @property
     @deprecated("'components' is deprecated, use 'target' instead.")
     def components(self) -> TargetComponents:
-        """The target components (deprecated).
+        """The target components.
 
         Warning: Deprecated in v0.10.3
             Use [`target`][..target] instead.

src/frequenz/dispatch/_dispatcher.py

@@ -328,9 +328,9 @@ async def start_managing(
         [`ActorDispatcher`][frequenz.dispatch.ActorDispatcher] for the given type that will
         start, stop and reconfigure actors based on received dispatches.
 
-        You can await the [`Dispatcher`][frequenz.dispatch.Dispatcher] instance to block until all types
-        registered with [`start_managing`][..start_managing] are stopped using
-        [`stop_managing`][..stop_managing].
+        You can await the [`Dispatcher`][frequenz.dispatch.Dispatcher] instance to block
+        until all types registered with [`start_managing`][..start_managing] are stopped
+        using [`stop_managing`][..stop_managing].
 
         "Merging" means that when multiple dispatches are active at the same time,
         the intervals are merged into one.