Allow anchors to word-break anywhere

[NadavTasher]

Purpose

Anchors with very long unbreakable links cause pages to be horizontally scrollable on mobile.
Fix this by allowing anchors to break anywhere.

This was observed on the following page:
https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html#why-cpio-rather-than-tar

Screenshots

Without the proposed changes:

With the proposed changes:

[mgeier]

I've used this before:

    overflow-wrap: break-word;

Can anyone tell which one is better in this case?

[NadavTasher]

From https://stackoverflow.com/questions/17259916/difference-between-overflow-wrap-and-word-break, it seems as though word-break is actually deprecated. I'll update my PR to use overflow-wrap.