fix indentation and a sphinx warning
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 618f4e6..fa7b7f0 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -712,8 +712,7 @@
single: debugger
Set the system's trace function, which allows you to implement a Python
- source code debugger in Python. See section :ref:`debugger-hooks` in the
- chapter on the Python debugger. The function is thread-specific; for a
+ source code debugger in Python. The function is thread-specific; for a
debugger to support multiple threads, it must be registered using
:func:`settrace` for each thread being debugged.
@@ -762,10 +761,10 @@
``'c_exception'``
A C function has thrown an exception. *arg* is ``None``.
- Note that as an exception is propagated down the chain of callers, an
- ``'exception'`` event is generated at each level.
+ Note that as an exception is propagated down the chain of callers, an
+ ``'exception'`` event is generated at each level.
- For more information on code and frame objects, refer to :ref:`types`.
+ For more information on code and frame objects, refer to :ref:`types`.
.. note::