Fix test-demandimport and test-trusted under Windows

The Windows-only wrapper around stdout is causing both of these tests to fail.
test-demandimport fails because it tries to print repr(sys.stdout).  Use
stderr instead since that is not wrapped.

test-trusted fails because the wrapper doesn't handle softspace and an
unexpected extra space gets printed.

mercurial/windows.py

@@ -41,6 +41,7 b' class winstdout(object):'
             limit = 16000
             l = len(s)
             start = 0
+            self.softspace = 0;
             while start < l:
                 end = start + limit
                 self.fp.write(s[start:end])

tests/test-demandimport.py

@@ -36,5 +36,5 b' print "fred.sub =", f(fred.sub)'
 print "fred =", f(fred)
 
 print "re =", f(re)
-print "re.stdout =", f(re.stdout)
+print "re.stderr =", f(re.stderr)
 print "re =", f(re)

tests/test-demandimport.py.out

@@ -11,5 +11,5 b" fred = <unloaded module 're'>"
 fred.sub = <function sub at 0x?>
 fred = <proxied module 're'>
 re = <unloaded module 'sys'>
-re.stdout = <open file '<stdout>', mode 'w' at 0x?>
+re.stderr = <open file '<stderr>', mode 'w' at 0x?>
 re = <proxied module 'sys'>