cygwin has... interesting fs semantics (I got an unaccessible yet

undeletable file on running this manually, which vanished after the
parent(!) process exited), so disable this test for it

check.t

@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/check.t,v 1.212 2008/07/10 21:55:08 tg Exp $
+# $MirOS: src/bin/mksh/check.t,v 1.213 2008/07/11 00:23:59 tg Exp $
 # $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
 # $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
@@ -1729,6 +1729,7 @@ expected-stderr-pattern:
 name: history-unlink
 description:
 	Check if broken HISTFILEs do not cause trouble
+category: !os:cygwin
 arguments: !-i!
 env-setup: !ENV=./Env!HISTFILE=foo/hist.file!
 file-setup: file 644 "Env"