Paragraph algorithm breaks lines between tt element comma immediately after it

I have a `tt` element immediately followed by a comma, with no space between them. The paragraph algorithm (justifying) places the comma on the next line. It should rather keep the comma on the same line.

The following HTML reproduces the problem.

```

@page {
size: A4;
margin: 2cm;
}

body {
font-family: sans-serif;
font-size: 10pt;
line-height: 1.25em;
}

This is a test to show that the paragraph algorithm breaks lines between the end of an inline block and, a comma immediately following said inline block.

```

Tested using the following code to convert the HTML to PDF.

```
try (OutputStream out = Files.newOutputStream(new File("/tmp/x.pdf").toPath())) {
PdfRendererBuilder prb = new PdfRendererBuilder();
prb.useFastMode();
prb.toStream(out);
prb.withFile(new File("/tmp/x.html"));
try (PdfBoxRenderer renderer = prb.buildPdfRenderer()) {
renderer.createPDF();
}
}
```