Combine lines.

I originally inserted two words for minimal change. The suggestion reads much better.

Co-authored-by: Adam Turner <[email protected]>

Author: gstein

Doc/reference/compound_stmts.rst

@@ -384,7 +384,7 @@ have ambiguous semantics.
 It is not possible to mix :keyword:`except` and :keyword:`!except*`
 in the same :keyword:`try`.
 The statements
-:keyword:`break`, :keyword:`continue` and :keyword:`return`
+The :keyword:`break`, :keyword:`continue`, and :keyword:`return` statements
 cannot appear in an :keyword:`!except*` clause.