Move boolean values to strings.

[moritzbuhl]

On web the boolean values are not displayed (in my browser) and especially cause confusion for the H3 entry of linuxquic.

[MPK1]

This might be caused by the fact that they are "pretty printed" with emojis (e.g, Unicode 0x2705), see here. Your proposal should immediately fix this, but using a string variable to store a boolean is kind of suboptimal. I would rather suggest changing the way of "pretty printing" so that all browsers support it or at least add some fallback that prints "true/false". If you tell me which browser you're using, I can quickly try some ideas to fix this.

[moritzbuhl]

This is how it looks like in my Firefox (on OpenBSD):

Looks like my Firefox has some problems displaying emojis. I cannot even see them in the source code viewer on GitHub:

But since the link mdi icon works, maybe it would make sense to replace the checkmark and cross emojis in the js with spans?