> Do you you mean s/update/clone/? duh, yes
> I don't think the devguide should cover tortoisehg.

Given the obnoxiousness of Command Prompt, and how foreign it is to working on Windows, I think maybe there should be an addendum *somewhere*, but I don't expect anyone else to write it. (Goodness, there is a devguide chapter for emacs editing.) The easiest way to run direct hg commands is within the command pane of Workbench.

About  "run `make patchcheck`". The current Committing page gives
"(or ./python.exe Tools/scripts/patchcheck.py on Windows)" as the windows equivalent. './' does not work on Windows. '.\' will, but I do not know if it is needed. I presume the command should be given from within a particular repository. In its top directory, 'python' will run the installed python, 'PCbuild\python.exe' or 'PCbuild\python_d.exe' (backslash required here, though not in the patchcheck path) is needed to run the python built from that repository.