docs: clarify default exclusion pattern in documentation (#1796)

* Update excluding.rst

Clarify default exclusion pattern.

* Update config.rst

Clarify default exclusion pattern.

doc/config.rst

@@ -591,7 +591,7 @@ Settings common to many kinds of reporting.
 (multi-string) A list of regular expressions.  This setting is similar to
 :ref:`config_report_exclude_lines`: it specifies patterns for lines to exclude
 from reporting.  This setting is preferred, because it will preserve the
-default exclude patterns instead of overwriting them.
+default exclude pattern ``pragma: no cover`` instead of overwriting it.
 
 .. versionadded:: 7.2.0
 

doc/excluding.rst

@@ -34,10 +34,10 @@ code, the "if debug" clause is excluded from reporting::
         log_message(msg, a)
     b = my_function2()
 
-Any line with a comment of "pragma: no cover" is excluded.  If that line
-introduces a clause, for example, an if clause, or a function or class
-definition, then the entire clause is also excluded.  Here the __repr__
-function is not reported as missing::
+By default, any line with a comment of ``pragma: no cover`` is excluded.
+If that line introduces a clause, for example, an ``if`` clause, or a function
+or class definition, then the entire clause is also excluded.
+Here the ``__repr__`` function is not reported as missing::
 
     class MyObject(object):
         def __init__(self):