A Save into a directory that is not there says no such directory, ENOENT

It failed EIO with `file not found`, which named no file that was
missing. It says `Save <path>: no such directory`, and a late failure
saying `no such` answers ENOENT, as a builtin's does.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/test/fs.py b/test/fs.py
index d2cd631c..f759d185 100644
--- a/test/fs.py
+++ b/test/fs.py
@@ -387,7 +387,7 @@ def discovery(binary, embedded=False):
                 client.write(f'/pane/{unsaved}/ctl', b'Save /nonexistent-pardes-dir/x.txt\n')
                 raise AssertionError('a Save into a missing directory succeeded')
             except OSError as refused:
-                assert 'Save /nonexistent-pardes-dir/x.txt: ' in str(refused), refused
+                assert 'Save /nonexistent-pardes-dir/x.txt: no such directory' in str(refused), refused
             assert f'err {unsaved} ctl: Save /nonexistent-pardes-dir/x.txt: '.encode() in client.read('/log'), client.read('/log')
             client.remove(f'/pane/{unsaved}')