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Meta Is code formatting of double underscore + 4 spaces indention a bug?

Normal code formatting can be done by adding 4 spaces in front, no problem: #define STUFF 123 And that turns out light blue:ish in my browser (Firefox) in some code-friendly, fixed-width font l...

1 answer  ·  posted 3d ago by Lundin‭  ·  edited 3d ago by trichoplax‭

Question support bug code-formatting
#2: Post edited by user avatar trichoplax‭ · 2025-06-09T17:12:00Z (3 days ago)
Put screenshot in quote block to distinguish it from the rest of the post
Is code formatting of double underscore + 4 spaces indention a bug?
  • Normal code formatting can be done by adding 4 spaces in front, no problem:
  • #define STUFF 123
  • And that turns out light blue:ish in my browser (Firefox) in some code-friendly, fixed-width font like Courier or whatever.
  • I just noticed that code containing double underscore and code formatted by adding 4 spaces ends up like this:
  • #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )
  • Now the color is wine red and part of it is in italics. But otherwise code formatted in a code-friendly font. Huh.
  • If we instead do 5 spaces:
  • #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )
  • Then it ends up as expected.
  • Is this is a bug or am I missing something about how code formatting/markdown works?
  • ---
  • **Screen shot of this meta post:**
  • (In case the result isn't rendered the same way for everyone or in case the bug gets fixed in the future.)
  • ![Image_alt_text](https://software.codidact.com/uploads/pt7rgkxin5txwvruzz9ppf6ycvyz)
  • Normal code formatting can be done by adding 4 spaces in front, no problem:
  • #define STUFF 123
  • And that turns out light blue:ish in my browser (Firefox) in some code-friendly, fixed-width font like Courier or whatever.
  • I just noticed that code containing double underscore and code formatted by adding 4 spaces ends up like this:
  • #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )
  • Now the color is wine red and part of it is in italics. But otherwise code formatted in a code-friendly font. Huh.
  • If we instead do 5 spaces:
  • #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )
  • Then it ends up as expected.
  • Is this is a bug or am I missing something about how code formatting/markdown works?
  • ---
  • **Screen shot of this meta post:**
  • (In case the result isn't rendered the same way for everyone or in case the bug gets fixed in the future.)
  • > ![Image_alt_text](https://software.codidact.com/uploads/pt7rgkxin5txwvruzz9ppf6ycvyz)
#1: Initial revision by user avatar Lundin‭ · 2025-06-09T14:55:09Z (3 days ago)
Is code formatting of double underscore + 4 spaces indention a bug?
Normal code formatting can be done by adding 4 spaces in front, no problem:

    #define STUFF 123

And that turns out light blue:ish in my browser (Firefox) in some code-friendly, fixed-width font like Courier or whatever.

I just noticed that code containing double underscore and code formatted by adding 4 spaces ends up like this:

    #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )

Now the color is wine red and part of it is in italics. But otherwise code formatted in a code-friendly font. Huh.

If we instead do 5 spaces:

     #define COUNT(...) ( 0 __VA_OPT__(COUNT1(__VA_ARGS__)) )

Then it ends up as expected.

Is this is a bug or am I missing something about how code formatting/markdown works?

---

**Screen shot of this meta post:** 

(In case the result isn't rendered the same way for everyone or in case the bug gets fixed in the future.)

![Image_alt_text](https://software.codidact.com/uploads/pt7rgkxin5txwvruzz9ppf6ycvyz)