change doc

Author: charlesdong1991

doc/source/whatsnew/v0.25.0.rst

@@ -93,7 +93,7 @@ Other API Changes
 Deprecations
 ~~~~~~~~~~~~
 
-- :func:`Series.str.replace`, when pat is single special regex character and regex is not defined, regex is by default ``False`` for now, but this might be deprecated in the future. (:issue:`24804`)
+- :func:`Series.str.replace`, when ``pat`` is single special regex character (such as ``.|\`` etc) and regex is not defined, regex is by default ``False`` for now, but this might be deprecated in the future. (:issue:`24804`)
 - Deprecated the `M (months)` and `Y (year)` `units` parameter of :func: `pandas.to_timedelta`, :func: `pandas.Timedelta` and :func: `pandas.TimedeltaIndex` (:issue:`16344`)
 
 .. _whatsnew_0250.prior_deprecations: