Reporting "nearly-exact" adds (Was: Windows test suite state)

[Adrian Buehlmann]

Sigh. It seems we have some more serious issues with hg add
than just test output differences:

With your patches applied (plus that known bug fixed), on Windows
(hgt = hg -- just my wrapper bat):

> hgt sta
--- running hg from W:\hg-crew-paul
? x\a.txt

> hgt add x\a.txt
--- running hg from W:\hg-crew-paul
adding x\a.txt

> hgt sta
--- running hg from W:\hg-crew-paul
A x\a.txt
? x\a.txt

last output looks like there is some serious confusion
in the dirstate (same file both "unkown" and "added").