patch 8.2.1280: Ex command error cannot contain an argument Commit: https://github.com/vim/vim/commit/8930caaa1a283092aca81fdbc3fcf15c7eadb197 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jul 23 16:37:03 2020 +0200 patch 8.2.1280: Ex command error cannot contain an argument Problem: Ex command error cannot contain an argument. Solution: Add ex_errmsg() and translate earlier. Use e_trailing_arg where possible.

/^CFLAGS[[:blank:]]*=/s/$/ -Wall -Wextra -Wshadow -Werror/
/^PERL_CFLAGS[[:blank:]]*=/s/$/ -Wno-error=unused-function/