Have you found "soft tabs"? That option will make TextMate use spaces instead of tab characters. Read 4.11 "Using Spaces Instead of Tabs" in Dan Strombergs link for instrucitons.

2015-11-21 21:36 GMT+01:00 Jeon-Young Kang <jykang22@gmail.com>:
I've tried to choose "instead of spaces". But there is no option of mine (Textmate 2 beta).

On Sat, Nov 21, 2015 at 3:14 PM, Dan Stromberg <strombrg@gmail.com> wrote:

Perhaps enable soft tabs?

This is an issue in Python too (at least from PEP8's perspective) - but note that many "make" programs require tabs instead of spaces.

On Sat, Nov 21, 2015 at 11:13 AM, Jeon-Young Kang <jykang22@gmail.com> wrote:

Hello everyone.


I am a newbie of Haskell, using Textmate on mac.


I got the following warning. How can I fix it?


Warning:

    Tab character

Ok, modules loaded: Main.



Sincerely,
Young

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Dan Stromberg

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Jeon-Young Kang

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