contrib/win32/hg.bat

py3: stop normalizing 2nd argument of *attr() to unicode

Now that we don't byteify strings, we can stop normalizing the 2nd
string argument to getattr() and remove explicit overrides we were
using in the code base.

We no longer use some helper functions in the source transformer,
so we remove those as well.

Differential Revision: https://phab.mercurial-scm.org/D7012

@echo off
rem Windows Driver script for Mercurial

setlocal
set HG=%~f0

rem Use a full path to Python (relative to this script) if it exists,
rem as the standard Python install does not put python.exe on the PATH...
rem Otherwise, expect that python.exe can be found on the PATH.
rem %~dp0 is the directory of this script

if exist "%~dp0..\python.exe" (
    "%~dp0..\python" "%~dp0hg" %*
) else (
    python "%~dp0hg" %*
)
endlocal

exit /b %ERRORLEVEL%