Updated code CSS wordbreak settings

[ascopes]

Updates <code> tag CSS to enable breaking on word boundaries rather than
on any character. This stops things like package names breaking mid-word rather
than on the closest appropriate period character, improving readability.

Before (note the io.netty.example part):

After:

[trustin]

IIRC This was intentional because the class names can get quite long, making the paragraph look bad if we don't break it.

[ascopes]

@trustin if this is the case, there might be a way to break these up using a JS script similar to http://heap.ch/blog/2016/01/19/camelwrap/

It still doesnt fix the issue for those not using JS, but it will improve the situation.

Perhaps implementing the default with a JS shim to alter to this as default may be beneficial?

[trustin]

@ascopes CamelWrap sounds like a good workaround. Could you update this PR to apply CamelWrap so most users see nicely broken identifiers?

[ascopes]

Will take a look at the weekend!