code style + 404 instead of forbidden error

tracim/tracim/lib/webdav/sql_resources.py

 from tracim.lib.webdav.design import designThread, designPage
 
 from wsgidav import compat
-from wsgidav.dav_error import DAVError, HTTP_FORBIDDEN
+from wsgidav.dav_error import DAVError
+from wsgidav.dav_error import HTTP_FORBIDDEN
+from wsgidav.dav_error import HTTP_NOT_FOUND
 from wsgidav.dav_provider import DAVCollection, DAVNonCollection
 from wsgidav.dav_provider import _DAVResource
 from tracim.lib.webdav.utils import normpath
         # INFO - G.M - 21-03-2018 - Obtain true davFile from provider
         resource = self.provider.getResourceInst(path, self.environ)
         if not resource:
-            raise DAVError(HTTP_FORBIDDEN)
+            raise DAVError(HTTP_NOT_FOUND)
         content = resource.content
-        return File(path=path, content=content,environ=self.environ)
+        return File(path=path, content=content, environ=self.environ)
 
     def createCollection(self, label: str) -> 'Folder':
         """