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[bug #48276] Better errors for accidental spaces

From: Steve Klabnik
Subject: [bug #48276] Better errors for accidental spaces
Date: Mon, 20 Jun 2016 16:10:20 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0


                 Summary: Better errors for accidental spaces
                 Project: make
            Submitted by: steveklabnik
            Submitted on: Mon 20 Jun 2016 04:10:17 PM GMT
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: SCM
        Operating System: Any
           Fixed Release: None
           Triage Status: None



Hey there,

Over the weekend, I was working with someone who uses spaces over tabs in all
the programming that they do. Their editor wasn't properly configured to
switch when using make, and so they got the classic "missing separator." error
message. Today, I learned that make already has a special error for an
eight-space indent, "missing separator (did you mean TAB instead of 8

I know eight spaces is classic, but many languages use two or four space
indents as a style. Would there be any interest in also adding messages for
these cases? I have written a simple patch for this, but since I'm not a
project member, cannot submit it directly.

Is there any interest in a patch for this? My current iteration is to do the
simplest thing, and detect 2 and 4 directly, but I think with some work I
could make it detect an arbitrary number, if that's preferred. Thoughts?


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