protocol diagram is hard to read

[melvincarvalho]

How it looks on my large screen:

[kumiponi]

This happens at least with Firefox on Linux. The default 'sans-serif' font is wider than in Chromium-based browsers. The diagram is an SVG image.

The issue could be fixed by moving the bold words into 'tspan' elements inside the 'text' elements and/or defining an appropriate width for the 'text' elements.