tests: remove case-folding false positive

tests/test-casefolding.t

@@ -1,75 +1,74 b''
   $ "$TESTDIR/hghave" icasefs || exit 80
 
   $ hg debugfs | grep 'case-sensitive:'
   case-sensitive: no
 
 test file addition with bad case
 
   $ hg init repo1
   $ cd repo1
   $ echo a > a
   $ hg add A
   adding a
   $ hg st
   A a
   $ hg ci -m adda
   $ hg manifest
   a
   $ cd ..
 
 test case collision on rename (issue750)
 
   $ hg init repo2
   $ cd repo2
   $ echo a > a
   $ hg --debug ci -Am adda
   adding a
   a
   committed changeset 0:07f4944404050f47db2e5c5071e0e84e7a27bba9
-  $ hg mv a A
-  A: not overwriting - file exists
+
+Case-changing renames should work:
 
-'a' used to be removed under windows
-
-  $ test -f a || echo 'a is missing'
+  $ hg mv a A
+  $ hg mv A a
   $ hg st
   $ cd ..
 
 test case collision between revisions (issue912)
 
   $ hg init repo3
   $ cd repo3
   $ echo a > a
   $ hg ci -Am adda
   adding a
   $ hg rm a
   $ hg ci -Am removea
   $ echo A > A
 
 on linux hfs keeps the old case stored, force it
 
   $ mv a aa
   $ mv aa A
   $ hg ci -Am addA
   adding A
 
 used to fail under case insensitive fs
 
   $ hg up -C 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg up -C
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
 no clobbering of untracked files with wrong casing
 
   $ hg up -r null
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo gold > a
   $ hg up
   a: untracked file differs
   abort: untracked files in working directory differ from files in requested revision
   [255]
   $ cat a
   gold
 
   $ cd ..