Effidit: An Assistant for Improving Writing Efficiency. - Shuming Shi 001; Enbo Zhao; Wei Bi; Deng Cai 002; Leyang Cui; Xinting Huang; Haiyun Jiang; Duyu Tang; Kaiqiang Song; Longyue Wang; Chenyan Huang; Guoping Huang; et al. (ACL (demo), 2023)