patch 8.1.2005: the regexp.c file is too big Commit: https://github.com/vim/vim/commit/6d7d7cf750bca5d641e464f6a3af5ee5b99a5ac8 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 7 23:16:33 2019 +0200 patch 8.1.2005: the regexp.c file is too big Problem: The regexp.c file is too big. Solution: Move the backtracking engine to a separate file. (Yegappan Lakshmanan, closes #4905)