Carriage return left in CSS when compiling multiline rules with CR LF line ends

[Dottenpixel]

When converting from SCSS to CSS using node-sass, any multi-line properties are converted to one-line with \a escape characters to replace the new lines in the output CSS.

.class {
  height: calc(
    …long calc…
  );
}

converts to:

.class {   height: calc(\a     …long calc…\a   )'); }

In this case, I don't have control over the incoming SCSS and can't use another process to clean the new lines. Is there a way to remove these escape characters purely through node-sass?

[saper]

Are you sure those are \a which ASCII BEL character?

I have produced a simple test case:

> cat > t1.scss
.class {
  height: calc(
    100px
    - 50px
  );
}
> unix2dos t1.scss

We can see 0d 0a CR/LF line endings:

> hd t1.scss
00000000  2e 63 6c 61 73 73 20 7b  0d 0a 20 20 68 65 69 67  |.class {..  heig|
00000010  68 74 3a 20 63 61 6c 63  28 0d 0a 20 20 20 20 31  |ht: calc(..    1|
00000020  30 30 70 78 0d 0a 20 20  20 20 2d 20 35 30 70 78  |00px..    - 50px|
00000030  0d 0a 20 20 29 3b 0d 0a  7d 0d 0a                 |..  );..}..|
0000003b

Running node-sass:

> node-sass t1.scss t1.css
Rendering Complete, saving .css file...
Wrote CSS to /home/saper/node_modules/node-sass/t1.css
> hd t1.css
00000000  2e 63 6c 61 73 73 20 7b  0a 20 20 68 65 69 67 68  |.class {.  heigh|
00000010  74 3a 20 63 61 6c 63 28  0d 20 31 30 30 70 78 0d  |t: calc(. 100px.|
00000020  20 2d 20 35 30 70 78 29  3b 20 7d 0a              | - 50px); }.|
0000002c

We can see that 0d (\r) CR characters are in the lines.

I think this is sass/libsass#2693 and it should be fixed with libsass 3.6 (sass/libsass#2849).