pascal case "error404" is converted to sentence case "Error404" instead of "Error 404"

[khalyomede]

This one is a ltitle bit tricky because it seems on the internet all case converters are producing the same output, which bugs me.

How is a sentence case algorithm not considering words ending with numbers 2 seperate entities, and "__toString" will trim the underscores, but still produce a single word (#84)? Seems like there is something I do not get with the logic.