Not possible to set font in flamegraphs to default fonts

[Itamar Turner-Trauring]

In CSS I can do:

body {
     font-family: monospace;
}

but I can't do that with flamegraph, because it turns it into:

body {
     font-family: "monospace";
}

which means "the font called monospace" rather than "default monospace font".

[Jon Gjengset]

Ah, yes, that happens here:

inferno/src/flamegraph/svg.rs

Line 125 in b8b2f0d

 enquote('\"', &opt.font_type), 

I think we just need to teach that code path about the "special" font names so that it doesn't escape those! I'd be happy to take a look at a PR 👍