Errors are said in words, and a refusal names what it takes

A failure read `Del k|j: InvalidArgument`, `Kill: NoSuchCommand`, `ill-formed control message`, or nothing at all. reportError now spells an error's name as words, and the refusals name their accepted forms: pty/ctl lists its verbs, a flag file takes 1 or 0, a setting word takes on or off, Del takes k, j or nothing, Repl takes - or a language. Kill with nothing to stop says so, /focus says pane, a Look that found nothing says no match, and pty/run on a command pane says it is not a shell. A ctl write's failure has room for the Repl list and is cut between words, the Repl word at a character.

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 45c38c2e..53a9d4df 100644
--- a/test/fs.py
+++ b/test/fs.py
@@ -246,7 +246,7 @@ def discovery(binary, embedded=False):
                 client.write('/focus', b'99999\n')
                 raise AssertionError('focus took a serial no pane has')
             except OSError as refused:
-                assert 'no such window' in str(refused), refused
+                assert 'no such pane' in str(refused), refused
             # /ctl reads the settings as a write takes them and takes the
             # session's builtins; a pane's ctl takes the pane's.
             settings = client.read('/ctl')