Should a deeper-nested style specification inherit the colors/style of its parent?

I have question related to jQuery Terminal

This may be a bug, or it may be a bug in my expectations. I would expect that a string like this:

[[;green;black]This text is green but [[u;;]this text is green and underlined] and this is green]

Would produce text that is all green/black, with an underlined section in the middle. However, the underlined text is the default text color.

Is this working as intended?

[jcubic]

released in 2.8.0

[jcubic]

You can now use this:

[[b;#fff;]hello [[u-b;;] world] from js]

it will be converted to (by nested formatting):

[[b;#fff;]hello ][[u;#fff;] world][[b;#fff;] from js]

and remove bold from text " world", and " from js" will be bold.