Vim.Message: add get_hit_enter_max_length()
Vim.Message: get_hit_enter_max_length(): s/maxcol/maxlen/g
Vim.Message: get_hit_enter_max_length(): fix ambiguous comment
Vim.Message: get_hit_enter_max_length(): {return value} -= 1

Thanks @osyo-manga
https://github.com/vim-jp/vital.vim/pull/183
Vim.Message: get_hit_enter_max_length(): cmdheight

Thanks @osyo-manga
https://github.com/vim-jp/vital.vim/pull/183
Vim.Message: get_hit_enter_max_length(): indent
Process: doc: add capture(), get_hit_enter_max_col()
Process: spec: add capture(), get_hit_enter_max_col()
Vim.Message: get_hit_enter_max_col(): fix tag
Merge pull request #183 from vim-jp/get_hit_enter_max_col

hit-enter-promptが出ない最長の文字列長を取得する関数を追加