If I use arrow keys, I will get the text in the above picture.
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Very similar (possibly duplicate): Escape sequences from external commands cluttering output in GVim. – Martin Tournoij Dec 31 '16 at 3:32
Looks like you're using Macvim/GVim. GVim isn't a full terminal emulator, so don't expect everything to work. You can't use arrows, but you can Delete.
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Is there an elegent way except applying plugins like ConqueTerm to run interactive command in GVim? – MrDwZ Dec 26 '16 at 7:53
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