How to ignore an autocmd in vim's undo history?

Posted by Dave Vogt on Super User See other posts from Super User or by Dave Vogt
Published on 2010-08-06T08:24:41Z Indexed on 2011/06/26 8:24 UTC
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vim

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undo

I have the following autocommand, which basically strips whitespace at the end of each line. Unfortunately, at each save, it inserts a step into the undo to jump to the beginning to the file, which is quite annoying. Is there a way to make vim ignore jumping around in the following command, so that undoing keeps the cursor in position?

autocmd BufWritePre *
    \ let s:bufwritepre_currline = line('.') |
    \ let s:bufwritepre_currcol = col('.')   |
    \ silent %s/\s*$//                       |
    \ call cursor(s:bufwritepre_currline, s:bufwritepre_currcol)

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