Ned Deily added the comment:

Zach, thanks for addressing most of the comments. The Makefile does now work as 
intended and more information is retained in the help.txt.

But I'm still troubled by the plaintext rendering, particularly of the inline 
code markup.  With the `` marks from the reStructuredText directives appearing 
in the help.txt, the help file as displayed is, IMO, more cluttered and, more 
importantly, more confusing.  Using `` to delimit displayed plaintext in lieu 
of more sophisticated text styling is unconventional at best.  I think changing 
the help file to include such marks would be a step backward.  But that's just 
one of the more obvious drawbacks of trying to use a plaintext format for help.

Ironically, the Tk text widget is perfectly capable of rendering richer text 
styles.  But, AFAIK, there hasn't been a use case up to now to support some 
sort of rich text format (be it rtf or html or rst directly) from a file in 
IDLE.  My initial thought was to suggest adding some sort of Tk-friendly 
Sphinx/Docutils builder.  That might be more generally useful but that will 
probably take a fair amount of work to define and implement.  Then it struck me 
that having an html-format help file would be able to represent all the 
existing Sphinx styles and, with the doc changes in the patch, we already have 
an html file that contains all the help text!  So rather than trying to sync 
the help file with the IDLE doc in the library, why not just display the 
library IDLE doc in a browser window?  IDLE already has a menu item and code to 
launch a web browser for the whole Python documentation set.  It would be easy 
to adapt that to change the IDLE help menu item to launch a web browser window w
 ith the IDLE page and get rid of help.txt.

There are a few issues that would need to be resolved.  The python.org binary 
installers and most Unix-y distributions can optionally install local copies of 
the Python doc set to eliminate the need for network access to docs.python.org. 
 There is platform-specific code in EditorWindow.__init__ to search locally for 
the doc files, falling back to http://doc.python.org if a local copy is not 
found.  The simplest approach would be to do the same for IDLE help, however 
that would have the drawback of there being no help available if the local copy 
had not been installed and there was no internet access.  Of course, that is 
the case today for the Python documentation.  If that is not acceptable for the 
help text, the docs build process could make a copy of a version of the 
library/idle.html into idlelib or, less desirable, the proposed plain text file 
could be the fallback.  Also, on Windows, AFAIK, the doc set is usually 
installed as a chm file which normally opens to the top-level inde
 x page in the help viewer.  A question is how to open directly to the IDLE 
page.  By inspection in the help viewer on Windows 7, it seems that a web 
browser.open call to a URL that appends '::/library/idle.html' to the existing 
pythonxxx.chm URL will open a browser window to the right page.  But there may 
be a better way to do that.

>From the user's perspective, ISTM that having the help in the rich format 
>possible with the existing doc html would be a huge advantage over what can be 
>provided with any plain text format.  Comments?

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<http://bugs.python.org/issue16893>
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