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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T16:07:53+00:00 2026-05-27T16:07:53+00:00

When I code Fortran, and use tabs for indentation, Vim highlights those spaces in

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When I code Fortran, and use tabs for indentation, Vim highlights those spaces in red, because in older Fortran the first 6 columns were special and reserved for labels/line numbers and continuation symbols. How can I make Vim stop doing that?

Thank you.

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  1. Editorial Team
    Editorial Team
    2026-05-27T16:07:53+00:00Added an answer on May 27, 2026 at 4:07 pm

    Actually, tab is not part of the Fortran character set, and portable code should avoid it. So instead I’d recommend to configure vim to use spaces instead of tabs for indentation, see the “expandtab” option.

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