I want Backspace key to remove only one space all the time, but after installing delimitMate, it removes extra space. Let's say I want to type the code below.

let hello = "some text";

While I'm typing this, I accidentally type extra space after hello, so there are two spaces between hello and my cursor as follows.

let hello  |

And, at this point, I decide to remove one space with Backspace, but it removes two spaces instead, so the cursor ends up next to o as in hello as follows.

let hello|

Now, I have to type space again to make sure there is one space between hello and =. This is redundant and I don't like this. Does anyone know how to make Backspace remove only one space all the time with delimitMate installed?


Thanks to the comment from B Layer, I found the mapping that was causing this. After commenting out the mapping code, I was able to remove only one space with Backspace key, but now when I delete a matching pair, it only deletes the opening one, and the closing one stays intact.






  • "Backspace command"? Do you just mean the backspace key? If so does :imap <bs> show anything? If so, try :verbose imap <bs> to see where the mapping is being created.
    – B Layer
    Oct 9, 2021 at 13:53
  • Yes, backspace key. I will edit it. :verbose imap <bs> showed that silent! imap <unique> <buffer> <BS> <Plug>delimitMateBS was the mapping, but I don't know how to fix it.
    – tet
    Oct 9, 2021 at 14:04
  • After taking a quick look at the docs to see the intended purpose of the backspace mapping it sounds like that behavior might be a bug. I think it should only do something if you're between paired delimiters. You might want to open an issue at the plugin's github site.
    – B Layer
    Oct 9, 2021 at 19:46
  • (Or if it's a "feature" they might be able to tell you how to selectively disable it...whether through available configuration or by hacking the code.)
    – B Layer
    Oct 9, 2021 at 19:58
  • 1
    I opened an issue at github.com/Raimondi/delimitMate/issues/297. Thank you for your suggestions.
    – tet
    Oct 10, 2021 at 1:10

1 Answer 1


The creator of delimitMate gave me a solution that worked for me. I'm a Rust programmer and this solution is specific for Rust files, so I don't know how this works for other files.

Add au FileType rust set sts=0 to your neovim config file.

Now, when you press the backspace key, it only removes one space. Take a look at the issue I opened at github for details, which led me to this solution.

  • You shouldnt have to modify the plugin. Just put the setlocal in ~/.vim/after/ftplugin/rust.vim.
    – D. Ben Knoble
    Oct 13, 2021 at 12:09
  • Adding setlocal in ~/.vim/after/ftplugin/rust.vim had no effect for me. Instead, adding au FileType rust set sts=0 to my neovim config file worked.
    – tet
    Oct 13, 2021 at 12:36
  • Well the path is different on neovim but the idea should work
    – D. Ben Knoble
    Oct 13, 2021 at 13:02

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