Mention that Exception is now a subclass of BaseException.
Remove a sentence that says that BaseException inherits from BaseException.
(I guess this is just a copy & paste mistake.)
diff --git a/Doc/lib/libexcs.tex b/Doc/lib/libexcs.tex
index b51b7fc..150f38d 100644
--- a/Doc/lib/libexcs.tex
+++ b/Doc/lib/libexcs.tex
@@ -80,7 +80,6 @@
 to be attached to the exception, attach it through arbitrary attributes on the
 instance.  All arguments are also stored in \member{args} as a tuple, but it will
 eventually be deprecated and thus its use is discouraged.
-\versionchanged[Changed to inherit from \exception{BaseException}]{2.5}
 \versionadded{2.5}
 \end{excdesc}
 
@@ -88,6 +87,7 @@
 All built-in, non-system-exiting exceptions are derived
 from this class.  All user-defined exceptions should also be derived
 from this class.
+\versionchanged[Changed to inherit from \exception{BaseException}]{2.5}
 \end{excdesc}
 
 \begin{excdesc}{StandardError}