Improve Pydoc interactive browsing (#2001). Patch by Ron Adam.

* A -b option to start an enhanced browsing session.
* Allow -b and -p options to be used together.
* Specifying port 0 will pick an arbitrary unused socket port.
* A new browse() function to start the new server and browser.
* Show Python version information in the header.
* A *Get* field which takes the same input as the help() function.
* A *Search* field which replaces the Tkinter search box.
* Links to *Module Index*, *Topics*, and *Keywords*.
* Improved source file viewing.
* An HTMLDoc.filelink() method.
* The -g option and the gui() and serve() functions are deprecated.

1 files changed, 14 insertions, 4 deletions

diff --git a/Doc/library/pydoc.rst b/Doc/library/pydoc.rst
index 3ab3303..842af3e 100644
--- a/Doc/library/pydoc.rst
+++ b/Doc/library/pydoc.rst
@@ -50,12 +50,21 @@ manner similar to the Unix :program:`man` command.  The synopsis line of a
 module is the first line of its documentation string.
 
 You can also use :program:`pydoc` to start an HTTP server on the local machine
-that will serve documentation to visiting Web browsers. :program:`pydoc -p 1234`
-will start a HTTP server on port 1234, allowing you to browse
-the documentation at ``http://localhost:1234/`` in your preferred Web browser.
+that will serve documentation to visiting Web browsers.  :program:`pydoc -p 1234`
+will start a HTTP server on port 1234, allowing you to browse the
+documentation at ``http://localhost:1234/`` in your preferred Web browser.
+Specifying ``0`` as the port number will select an arbitrary unused port.
+
 :program:`pydoc -g` will start the server and additionally bring up a
 small :mod:`tkinter`\ -based graphical interface to help you search for
-documentation pages.
+documentation pages.  The ``-g`` option is deprecated, since the server can
+now be controlled directly from HTTP clients.
+
+:program:`pydoc -b` will start the server and additionally open a web
+browser to a module index page.  Each served page has a navigation bar at the
+top where you can *Get* help on an individual item, *Search* all modules with a
+keyword in their synopsis line, and go to the *Module index*, *Topics* and
+*Keywords* pages.
 
 When :program:`pydoc` generates documentation, it uses the current environment
 and path to locate modules.  Thus, invoking :program:`pydoc spam`
@@ -69,3 +78,4 @@ be overridden by setting the :envvar:`PYTHONDOCS` environment variable
 to a different URL or to a local directory containing the Library
 Reference Manual pages.
 
+.. versionchanged:: 3.2