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This is a follow up of #14468, and in particular of msg183031.
The instructions in the "committing" page of the devguide are unix-centric, in particular:
 1) on Windows ~/.hgrc is $HOME$/mercurial.ini;
 2) the "Settings dialogs" of TortoiseHG can/should be used to edit mercurial.ini;
 3) the devguide suggests "./python.exe Tools/scripts/patchcheck.py", but ./ doesn't work on Windows.

Deleted ./ before python.exe

At least two of the changes in the patch are incorrect because they refer to the Mac OS X "python.exe".

Revert changes for Mac OS X

Sorry, but you cannot just rewrite ./python.exe to just python.exe
At least in http://docs.python.org/devguide/buildbots you have to make probably three sections: 
1. for linux users to use just ./python
2. for Mac ./python.exe
3. for Windows <path to repo>/PCBuild/python.exe or python_d.exe (IIRC)

What about adding a new "Platform Quirks" page listing all the known differences in usage between the three major platforms? Then in places where the instructions are a bit different per platform, like:
 ./python.exe -m test -j3
write something like
 <python> -m test -j3
and add a link to the relevant part of the Quirks page.
On the other hand, are there enough such "quirks" (meaning things that really are the same, just different invocations/etc.) to warrant a new page?

As previously pointed out, the current patches are not adequate.

This patch addresses Ezio's original issue in msg185482 to improve the Windows instructions on the "committing" page of the devguide.
I have tried to match the style of the "Getting Started" page when distinguishing UNIX (Mac OS X) commands from Windows commands. Please take extra care during review that the Windows commands documented are correct.
Barring reviewer changes, this patch should close this issue.

Right at the end of the patch, ".hg/hgrc" also exists on Windows and is not the same as mercurial.ini - hgrc here is per-repo and it seems from the context that this is relevant here.
Otherwise, the rest looks good to me. I'll merge it in when I get a chance, unless someone else gets there first.

Updated patch to include Steve Dower's feedback.

Tiny change on case of Windows file 'mercurial.ini'
Although Windows is case-insensitive on filenames, the file itself is named in lowercase (I'm using TortoiseHg v3.4.2; I'm assuming older versions of TortoiseHg also name it in this way.)

Also a similar change to patch.rst
./python.exe
should be:
PCbuild\<target>\python.exe

Looks like the patchcheck section also has a "PCBuild/python.exe" that should be fixed.
Are the previous commenters satisfied with the fixes?

In the patch:
-add configuration settings to ``~/.hgrc`` for the relevant repo(s) (remember
+add configuration settings to ``~/.hgrc`` (``mercurial.ini`` on Windows)
+for the relevant repo(s) (remember
This is nonsensical, `~/.hgrc` (`%USERPROFILE%\Mercurial.ini`) is the user-level Mercurial configuration; the settings "for the relevant repo(s)" are in `.hg/hgrc` in the repository (same on all platforms).
Btw, for me, the user-level config file on Windows has always been title-cased (`Mercurial.ini`) unless I preemptively created it myself. Really doesn't matter, though :)

Steve and Zach, If you are happy with the changes, I have no objection to committing and closing this issue.

Zach, Steve, Ezio: The latest patch is ready to be committed. Thanks.

The part of the patch that I pointed out in my previous message hasn't changed, and is wrong.

Zach, Sorry for not comprehending your comment re: latest patch correctly.
Since Rietveld isn't available on devguide, which makes comparison of patches difficult (at least for me), here's some proposed wording to see if I am understanding your comment correctly. If so, I will submit a new patch. Thanks.
Suggested wording for:
Minimal Configuration
---------------------
To use Mercurial as a committer (both of your and others’ patches),
you should set up some basic options in your configuration file.
On all platforms, you must edit ~/.hgrc. On Windows, TortoiseHg has a
graphical settings dialog for most options, meaning you don’t need to edit
the file directly if you find a graphical interface more helpful.

Sorry, I don't think we're on the same page yet :). My issue was with a different hunk further down.
Looking at it again, the fix I want is simple enough I'll just do it at commit; I'll get it later today.

New changeset 49be7fba3568 by Zachary Ware in branch 'default':
Closes #17570: Improve instructions for Windows.
https://hg.python.org/devguide/rev/49be7fba3568 

Made a couple of other fixes while fixing the point I'd already raised:
- Changed all instances of "`...`" to "*...*"
- Changed from "PCbuild\python.exe" to "python.bat"
- Wrapped a couple long lines
Thanks for the patch!

Thanks Zach :D Makes more sense now ;)