On Saturday, July 15, 2017 at 10:07:08 AM UTC-5, Zhe Lee wrote:
> nnoremap <leader>k :%s/\v^\s+//g<CR>:sort u<CR>:xa<CR>
> 
> 
> This is my map. When there is no match to the "^\s+", an error will come out, 
> and the map will pause, the sort u, and the xa will not be executed. So how 
> to continue the map when there is an error come out?

Add the 'e' flag to your substitute command to not throw an error for no 
matches.

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