gh-123756: Disable restart command if pdb is in inline mode (#123757)

Doc/library/pdb.rst

@@ -198,7 +198,7 @@ The ``run*`` functions and :func:`set_trace` are aliases for instantiating the
 access further features, you have to do this yourself:
 
 .. class:: Pdb(completekey='tab', stdin=None, stdout=None, skip=None, \
-               nosigint=False, readrc=True)
+               nosigint=False, readrc=True, mode=None)
 
    :class:`Pdb` is the debugger class.
 
@@ -217,6 +217,13 @@ access further features, you have to do this yourself:
    The *readrc* argument defaults to true and controls whether Pdb will load
    .pdbrc files from the filesystem.
 
+   The *mode* argument specifies how the debugger was invoked.
+   It impacts the workings of some debugger commands.
+   Valid values are ``'inline'`` (used by the breakpoint() builtin),
+   ``'cli'`` (used by the command line invocation)
+   or ``None`` (for backwards compatible behaviour, as before the *mode*
+   argument was added).
+
    Example call to enable tracing with *skip*::
 
       import pdb; pdb.Pdb(skip=['django.*']).set_trace()
@@ -233,6 +240,9 @@ access further features, you have to do this yourself:
    .. versionchanged:: 3.6
       The *readrc* argument.
 
+   .. versionadded:: 3.14
+      Added the *mode* argument.
+
    .. method:: run(statement, globals=None, locals=None)
                runeval(expression, globals=None, locals=None)
                runcall(function, *args, **kwds)
@@ -675,6 +685,10 @@ can be overridden by the local file.
    History, breakpoints, actions and debugger options are preserved.
    :pdbcmd:`restart` is an alias for :pdbcmd:`run`.
 
+   .. versionchanged:: 3.14
+      :pdbcmd:`run` and :pdbcmd:`restart` commands are disabled when the
+      debugger is invoked in ``'inline'`` mode.
+
 .. pdbcommand:: q(uit)
 
    Quit from the debugger.  The program being executed is aborted.