patch 8.1.0513: no error for set diffopt+=algorithm: commit https://github.com/vim/vim/commit/d0721058f494143186f66a60151c9634031a8c96 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 5 21:21:33 2018 +0100 patch 8.1.0513: no error for set diffopt+=algorithm: Problem: No error for set diffopt+=algorithm:. Solution: Check for missing argument. (Hirohito Higashi, closes https://github.com/vim/vim/issues/3598)

/* spellfile.c */
slang_T *spell_load_file(char_u *fname, char_u *lang, slang_T *old_lp, int silent);
void suggest_load_files(void);
int spell_check_msm(void);
void ex_mkspell(exarg_T *eap);
void mkspell(int fcount, char_u **fnames, int ascii, int over_write, int added_word);
void ex_spell(exarg_T *eap);
void spell_add_word(char_u *word, int len, int bad, int idx, int undo);
/* vim: set ft=c : */