Double <CR> in input mode about supertab

[ervandew]

The quickest solution for you would be to add the following to your vimrc:

let g:SuperTabCrMapping = 0

When I get a chance I'll see if I can get supertab to properly handle your mapping, but unfortunately vim doesn't make it easy.

[achalddave]

Cool, thanks. Out of curiosity, what is the issue? I tried understanding the code there but from what I can tell you send a <cr> only if my <cr> isn't mapped to something that includes <cr>, and the part that checks for is let cr = (map =~? '\(^\|[^)]\)<cr>'). Essentially, I'm interested in vimscript and was wondering what's different about my mapping that makes it difficult to work around.

[ervandew]

Vim unfortunately makes it very difficult to chain mappings together, so supertab attempts to handle chaining it's mapping against an existing mapping and it tries to determine when it can issue it's own <cr> without duplicating a <cr> from the other mapping. Usually the presence of a <cr> in the original is part of a <c-r>=SomeFunction<cr> mapping where the <cr> is simply telling vim that the <c-r>= portion is completed, not a literal carriage return. In your case the <cr> is a literal carriage return, so that's throwing it's code off a bit.

It looks like I'll have to update it to determine the context of the <cr> in the existing mapping or mappings if multiple are already chained together, which happens.

[mtikekar]

I have a potentially related problem with abbreviations. When I do :iabbrev a a<cr>b, it inserts two b's. let g:SuperTabCrMapping = 0 fixes it.

[ervandew]

@mehultikekar
For your issue I've just updated supertab to not map to <cr> if it detects an iabbrev mapping with a <cr> in it.

6f9b1f1

I get the double newline when the only plugins are supertab and the new version of tpope's endwise plugin*. Not sure which plugin is the cause since both had updates in the same timeframe. I'll also file an issue in endwise's repo.

• https://github.com/tpope/vim-endwise

[ervandew]

Seems to have been resolved by tpope/vim-endwise#55