Spot colors with spaces does not work

[Comiccobe]

Bug Report

Description of the problem

Adding a spot color that has spaces inside the name generates a faulty pdf that does not open in Illustrator. Replacing the spaces with underscores does work but that does not match the names pantone colors have when designers use it in Illustrator.

Error in Illustrator:

Inkscape opens the file but the rect does not get a color:

Code sample

var PDFKitDocument = require("pdfkit");
var fs = require("fs");
const doc = new PDFKitDocument({
  size: [500, 500],
});
doc.pipe(fs.createWriteStream("output.pdf"));
doc.addSpotColor("PANTONE 295 C", 100, 53, 0, 67);
doc.rect(100, 100, 200, 100).fill("PANTONE 295 C");
doc.end();

Your environment

• pdfkit version: 0.17.2
• Node version: 21.7.3
• Browser version (if applicable): N/A
• Operating System: macOS 15.3.1 (24D70)

[Comiccobe]

The problem seems to be that spaces are not being escaped properly.

This is how the pdf looks like right now:

[/Separation /PANTONE 295 C /DeviceCMYK <<

This is how it should look like:

[/Separation /PANTONE#20295#20C /DeviceCMYK <<

Spaces needs to be escaped by #20.

[Comiccobe]

If someone can point me in the right direction where to change this I can make a PR for it.