fix: preserve leading whitespace in PDF output using nbsp

[Martinrsts]

Small fix to make leading whitespaces in pdf to render correctly.

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commit: 9eca3a8

[nperez0111]

Thanks for the PR @Martinrsts, I'm not entirely sure what situations this fix would be relevant in. Can you describe a scenario that was broken in the previous behavior that works in this new behavior?

[Martinrsts]

Yes no problem. I use whitespaces at the beggining of new lines to represent indentation or align text. Without the change, if there is ' ' characters at the beginning of the line, they are all replaced by only one ' '. Here is an example:

Screenshot of the editor:

Screenshot of the PDF exportation without this PR:

Screenshot of the PDF exportation with this PR