docs: Restructure current_doc/paths mutual exclusion note

Move the note about mutual exclusivity into a proper `.. note::`
directive for better readability.

Author: SilverRainZ

docs/usage.rst

@@ -23,14 +23,14 @@ following parameters are available:
 
 ``current_doc``
   If ``True``, only return revisions that modified the current document
-  (default ``False``). When enabled, ``paths`` is overridden with a pathspec
-  matching the current document.
-  See also :example:`Recent Updates to Current Document`.
+  (default ``False``). 
+
+  .. note::
 
-.. note::
+     When enabled, ``paths`` is overridden with a pathspec matching the current
+     document. So ``paths`` and ``current_doc`` are mutually exclusive.
 
-   ``paths`` and ``current_doc`` are mutually exclusive. When ``current_doc=True``,
-   the ``paths`` parameter is ignored.
+  See also :example:`Recent Updates to Current Document`.
 
 .. role:: py(code)
   :language: Python