Function append

components/terminal/programmaticCommandLog.ts:93–101

(input: string)

      rewrites.push(rewrite);
    },
    append(input: string): string {
      if (!input) return "";
      if (rewrites.length === 0) {
        const output = pending + input;
        pending = "";
        return output;
      }
      return appendWithActiveRewrite(input);
    },
    finish(): string {
      const output = pending;
      pending = "";