cache.move fix target changed parent detection

if the path being moved was already in the common parent with the
target then we would mistakenly error, the correct version is to
detect whether the target parent and source parent are the same

augpathlib/caches.py

@@ -680,22 +680,23 @@ def move(self, *, remote=None, target=None, meta=None):
             return target
 
         common = self.commonpath(target).absolute()
+        target_parent = target.parent.absolute()
         parent = self.parent.absolute()
 
-        assert target.name != self.name or common != parent
+        assert target.name != self.name or target_parent != parent
 
-        if common != parent:
+        if target_parent != parent:
             _id = remote.id if remote else meta.id
             log.warning('A parent of current file has changed location!\n'
                         f'{common}\n{self.relative_to(common)}\n'
                         f'{target.relative_to(common)}\n{_id}')
 
 
-        if not target.parent.exists():
+        if not target_parent.exists():
             if remote is None:  # we have to have a remote to pull parent structure
                 remote = self._remote_class(meta)
 
-            target.parent.mkdir_cache(remote)
+            target_parent.mkdir_cache(remote)
 
         do_cast = not isinstance(target, self.__class__)
         if do_cast: