fix storage file mounts

examples/managed_spot_with_storage.yaml

@@ -52,3 +52,6 @@ run: |
 
   echo hi >> /tmp/workdir/new_file
   ls -al /tmp/workdir
+
+  cat ~/tmpfile
+  cat ~/a/b/c/tmpfile

sky/backends/cloud_vm_ray_backend.py

@@ -2975,8 +2975,7 @@ def _execute_file_mounts(self, handle: ResourceHandle,
                 sync = storage.make_sync_file_command(source=src,
                                                       destination=wrapped_dst)
                 # It is a file so make sure *its parent dir* exists.
-                mkdir_for_wrapped_dst = \
-                    f'mkdir -p {os.path.dirname(wrapped_dst)}'
+                mkdir_for_wrapped_dst = (f'mkdir -p {os.path.dirname(wrapped_dst)}')
 
             download_target_commands = [
                 # Ensure sync can write to wrapped_dst (e.g., '/data/').

sky/cloud_stores.py

@@ -80,8 +80,7 @@ def make_sync_dir_command(self, source: str, destination: str) -> str:
 
     def make_sync_file_command(self, source: str, destination: str) -> str:
         """Downloads a file using AWS CLI."""
-        download_via_awscli = (f'mkdir -p {destination} &&'
-                               f'aws s3 cp {source} {destination}')
+        download_via_awscli = f'aws s3 cp {source} {destination}'
 
         all_commands = list(self._GET_AWSCLI)
         all_commands.append(download_via_awscli)