cmux-tui: fix the base clippy red in the action argument contract test
What
Adds the missing ; after current = None at cmux-tui/crates/cmux-tui/src/cli/tests/action_argument_contract.rs:417 (from #36260). clippy::semicolon_if_nothing_returned under -D warnings fails the required "clippy (changed cmux-tui packages)" check on every PR that changes a cmux-tui package, for example #36511.
Changelog
none
Tests
The PR's own clippy check. No behavior change.
Agent session: agent session
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Summary by cubic
Fixes the clippy::semicolon_if_nothing_returned warning in the cmux-tui action argument contract test, which was failing the required clippy check on every PR that touches a cmux-tui package.
Adds the missing semicolon after current = None; no behavior change.