test-win32text.t: stabilize test output

The test sometimes failed because f4.bat wasn't dirty. I'm not sure whether it
should or shouldn't be dirty, but the extension is broken and deprecated and we
just want to see the deprecation warning, so now we just avoid showing the
dirtyness.

tests/test-win32text.t

@@ -393,16 +393,16 b' and now for something completely differe'
 
 Trigger deprecation warning:
 
-  $ hg id
+  $ hg id -t
   win32text is deprecated: http://mercurial.selenic.com/wiki/Win32TextExtension
-  b910084e3c98+ tip
+  tip
 
 Disable warning:
 
   $ echo '[win32text]' >> .hg/hgrc
   $ echo 'warn = no' >> .hg/hgrc
-  $ hg id
-  b910084e3c98+ tip
+  $ hg id -t
+  tip
 
   $ rm f3 f4.bat bin
   $ hg co -C 2>&1 | python -c 'import sys, os; sys.stdout.write(sys.stdin.read().replace(os.getcwd(), "...."))'