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Vim trim whitespace command is deleting percent signs?

I have been using Vim for years at work (legacy stack), and I recently decided to copy the trim function we use there. It is:

fun! TrimWhiteSpace()
    let l:save_cursor = getpos('.')
    %s/\s\+%//e
    call setpos('.', l:save_cursor)
endfun

command! Trim call TrimWhiteSpace()

So we just call :Trim, and it does it's work. While it works fine at work, at home it is also deleting % signs along with the white space. Example: printf("Testing %2f", float); will turn into printf("Testing 2f", float);.

The main difference is at work I am on a Unix server, and at home I am on Windows 11. Any idea what is causing this behavior?

P.S. It is possible that this behavior would happen at work too, but in Perl there really is never a situation where there would be white space followed by a %. In C, C++ (what I use at home) obviously there is a lot.

Edit: Let me add my .vimrc for context. It is really bare right now.

" GENERAL -------------------------------------------------------

set nocompatible " We are not messing with being vi compatible

set backspace=indent,eol,start " Fix backspace issue

imap <S-BS> <BS>

"filetype on " Enable file type detection

"filetype plugin on " Enable plugins and load plugins for file type

"filetype indent on " Load an indent file for the detected file type

syntax on " Turn syntax highlighting on

set hlsearch " Set highlight search

set showmatch " Show matching words during a search

set showmode " Show mode

set ignorecase " Ignore capital letters during search
set smartcase " But allow for searching by capital specifically

set incsearch " Incrementally highlight matching searches

set tabstop=3 " Set tab width

"set expandtab " Allow spaces instead of tabs

" Enable autocompletion menu after pressing tab
"set wildmenu
"set wildmode=list:longest
"set wildignore=*.docx,*.jpg,*.png,*.gif,*.pyc,*.flv,*.img,*xlsx

fun! TrimWhiteSpace()
    let l:save_cursor = getpos('.')
    %s/\s\+%//e
    call setpos('.', l:save_cursor)
endfun

command! Trim call TrimWhiteSpace()
Solution

  • The substitute command

    %s/\s\+%//e

    matches whitespace \s, repeated one or more times \+, followed by a literal percent sign % and replaces them with nothing, i.e. deleting them.

    The following command, on the other hand

    %s/\s\+$//e

    matches whitespace \s, repeated one or more times \+, followed by a line ending $ and replaces them with nothing.

    I think you have a typo in your expression and you actually use the second form at work. Please double check.

    See :help :substitute and :help pattern.