fix: apply the review items for #677 at merge

src/tmux-manager.ts: escapeTmuxTrailingSemicolon() JSDoc says every send-keys -l passes -- before the text, and its example uses the -l -- form
test/tmux-submit-paste.test.ts: the trailing-semicolon wiring test matches -l (?:-- )? so it pins only the semicolon rule
test/tmux-submit-paste.test.ts: master's two recorded-command tests for typed text expect the -l -- form (merge interaction with the inputRunner() refactor)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/tmux-manager.ts

@@ -479,9 +479,11 @@ export interface PasteTextCommands {
 
 /**
  * Escape a final `;` for tmux. tmux splits commands on an argument that ENDS in
- * `;` (`set-buffer -- 'a;'` stores `a`, `send-keys -l 'a;'` types `a`, a lone `;`
+ * `;` (`set-buffer -- 'a;'` stores `a`, `send-keys -l -- 'a;'` types `a`, a lone `;`
  * is no argument at all); a final `\;` is its escape for a literal `;`. A `;`
- * anywhere else in the argument is literal already. Exported for unit testing.
+ * anywhere else in the argument is literal already. Every `send-keys -l` passes
+ * `--` before the text, like `set-buffer`, or tmux parses a text that starts with
+ * `-` as its own options. Exported for unit testing.
  */
 export function escapeTmuxTrailingSemicolon(text: string): string {
   return text.endsWith(';') ? `${text.slice(0, -1)}\\;` : text;