Add version{changed,added} markers and make minor style changes (GH-4273)

Doc/howto/instrumentation.rst

@@ -317,12 +317,16 @@ Available static markers
    Fires before :mod:`importlib` attempts to find and load the module.
    ``arg0`` is the module name.
 
+   .. versionadded:: 3.7
+
 .. c:function:: import__find__load__done(str modulename, int found)
 
    Fires after :mod:`importlib`'s find_and_load function is called.
    ``arg0`` is the module name, ``arg1`` indicates if module was
    successfully loaded.
 
+   .. versionadded:: 3.7
+
 
 SystemTap Tapsets
 -----------------

Doc/library/pdb.rst

@@ -123,10 +123,10 @@ slightly different way:
    Enter the debugger at the calling stack frame.  This is useful to hard-code
    a breakpoint at a given point in a program, even if the code is not
    otherwise being debugged (e.g. when an assertion fails).  If given,
-   ``header`` is printed to the console just before debugging begins.
+   *header* is printed to the console just before debugging begins.
 
-   .. versionadded:: 3.7
-      The keyword-only argument ``header``.
+   .. versionchanged:: 3.7
+      The keyword-only argument *header*.
 
 
 .. function:: post_mortem(traceback=None)

Doc/library/zipapp.rst

@@ -86,6 +86,8 @@ The following options are understood:
 
    :option:`--compress` has no effect when copying an archive.
 
+   .. versionadded:: 3.7
+
 .. cmdoption:: --info
 
    Display the interpreter embedded in the archive, for diagnostic purposes.  In

Doc/whatsnew/3.7.rst

@@ -318,9 +318,9 @@ to be executed on a process fork.  (Contributed by Antoine Pitrou in
 pdb
 ---
 
-:func:`~pdb.set_trace` now takes an optional ``header`` keyword-only
+:func:`~pdb.set_trace` now takes an optional *header* keyword-only
 argument.  If given, this is printed to the console just before debugging
-begins.
+begins.  (Contributed by Barry Warsaw in :issue:`31389`.)
 
 re
 --