Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: methane

Doc/library/traceback.rst

@@ -119,8 +119,7 @@ Module-Level Functions
    :attr:`~BaseException.__cause__` or :attr:`~BaseException.__context__`
    attributes of the exception) will be
    printed as well, like the interpreter itself does when printing an unhandled
-   exception.  If *show_lines* is ``False``, source code lines are not included
-   in the output.
+   exception.
 
    If *show_lines* is false, source code lines are not included in the output.
 

Doc/whatsnew/3.15.rst

@@ -181,7 +181,7 @@ traceback
   It is default to ``True``.
 
   The ``recent_first`` argument controls whether the most recent frames are
-  displayed first or last in the traceback. It affects wheher the exception
+  displayed first or last in the traceback. It affects whether the exception
   is displayed at the top or bottom of the traceback. It is default to ``False``.
   (Contributed by Inada Naoki in :gh:`135751`)