Broken pipe when trimming lines (head)

```
❯ snapcraft revisions snapcraft | head -n1
stead. The old name will be removed in a future release. Rev. Uploaded Arches Version Channels

Exception ignored in: <_io.TextIOWrapper name='' mode='w' encoding='utf-8'>
BrokenPipeError: [Errno 32] Broken pipe
```

Reproduce the reported `snapcraft revisions snapcraft | head -n1` command and inspect how the CLI writes output and handles a closed stdout pipe. Done means trimming output with `head` no longer emits the ignored `BrokenPipeError` while the command still displays its first line.

Written by the indexing model from the issue text.