Add -E and -tt options to the python invocations, as for the Unix tests.
The -tt means modules that mix tabs and spaces will be rejected.
The -E refuses to believe Python options in the environment.
diff --git a/PCbuild/rt.bat b/PCbuild/rt.bat
index 00efe93..f99c7df 100755
--- a/PCbuild/rt.bat
+++ b/PCbuild/rt.bat
@@ -31,11 +31,11 @@
@if "%_qmode%"=="yes" goto Qmode
@echo Deleting .pyc/.pyo files ...
@%_exe% rmpyc.py
-%_exe% %_dashO% ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+%_exe% %_dashO% -E -tt ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
@echo About to run again without deleting .pyc/.pyo first:
@pause
:Qmode
-%_exe% %_dashO% ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
+%_exe% %_dashO% -E -tt ../lib/test/regrtest.py %1 %2 %3 %4 %5 %6 %7 %8 %9
@set _exe=
@set _qmode=
@set _dashO=